When word spread that a boy had been discovered dead in his tent from what appeared to be a drug overdose last summer, Chloe was at a music festival.
Later that day, according to Chloe (not her real name), a notice was posted on the festival's official app alerting everyone to a batch of "fatally strong" MDMA pills.
All of the billboards near the arena also had a message warning people not to take them, she claims.
No one else at the festival was hurt that weekend, according to Chloe, who thinks this is because of all the warnings.
On-site drug testing produced the findings that she has described.
It has been taking place at UK festivals for about ten years as a way to identify and alert people to potentially lethal substances.
On-site drug testing may not be available at UK music festivals this summer, according to Parklife's CEO, who spoke to BBC Newsbeat.
The Manchester event was started by Sacha Lord; earlier this month, it was unable to conduct on-site drug tests.
He claims they have been doing this since 2014, but he was informed that this year a special license would be required.
However, the application process takes three months, according to Sacha, who claims that the Home Office only notified him 48 hours before the event.
According to Sacha, conducting tests in a portable cabin, which is typically where festival testing is done, would have been challenging given the license's requirements.
In his assertion that the festival had previously collaborated with the police and the local council to approve drug testing, he accused the government of making a "U-turn" on the matter.
This will likely have an impact on all UK festivals this year, according to Sacha, who also serves as Labour mayor Andy Burnham's nightlife economic adviser for Manchester.
As of right now, there won't be any testing this summer, he said.
The biggest festival of the year, Glastonbury, is this weekend.
"I am extremely worried about the safety of a large number of customers. ".
According to the Home Office, a license was always required and the policy hadn't changed.
Newsbeat has gotten in touch with Glastonbury Festival to find out more about this year's drug testing procedures.
Festivals make a big deal out of the fact that they don't support or promote drug use.
Drugs will be prevented from entering with the help of security and law enforcement, but most people agree that it is nearly impossible to do so.
On-site testing is a major part of the harm reduction approach that is supported by so many significant UK festivals.
Most events use a third party to handle this "back of house" work and confiscated drugs or substances found in amnesty bins.
Testers will issue a warning to festival attendees if they discover something that could be hazardous—for example, something that is stronger than usual, contaminated, or sold as something it is not.
The Loop, a company that provides testing services at festivals, has conducted studies that indicate drug testing can lower fatalities.
Front-of-house testing is another technique that allows users to submit their drugs for safety testing.
Despite being tried out, it is less well-liked. Previous statements from the director of the Leeds and Reading Festivals expressed concern that it might inspire false confidence in people.
Meg is a DJ who has experience working on welfare teams at both events without on-site drug testing and festivals with it.
According to her, "I've had some experiences where I've been looking after 16-year-old girls who have taken way more than they thought they had.".
They may have taken a pill that was different from what they expected it to be, for example.
And it's really frightful. ".
When testing is conducted on-site, more information is available, according to Meg, making these situations "significantly reduced.".
And once we know how to handle it, she continues.
If the substance has been tested on-site, the welfare teams will be able to tell if it is extra-strong or not what the person thought it was.
Because there are numerous occasions when that could occur and it could seriously harm the drug user, Meg explains.
After Sacha Lord claimed the Home Office had changed its mind about back-of-house testing, BBC Newsbeat requested a response.
A license was deemed "long-established" as being necessary.
The Home Office licence must be applied for where parties offering drug testing services are engaging in activities involving controlled substances, a spokesperson said.
But according to Sacha, to assert that nothing has changed is "ridiculous," and the business community is thinking about suing the government.
The Loop, which has handled the majority of back-of-house testing at UK festivals, informed Newsbeat that it was unable to comment.
Check out Newsbeat on. Twitter. Â and . YouTube.
Tune in to Newsbeat. live. weekdays at 12:45 and 17:45 - or playback. here.
