A London Uber driver overreacted, a bit, to a customer who canceled her ride. He threatened to slit her throat.

28-year-old Anne Kealey says that she called an Uber at about 11am, but was forced to cancel the ride when it was a few minutes from her location – as people have to do from time to time. According to BuzzFeed, Kealey said she felt a panic attack coming on and simply decided it best to walk to brunch instead of taking the Uber.

Well, this doesn’t appear to have sat well with her Uber driver, who called and left an insane voicemail wherein he threatens to “cut her neck.”

“Don’t do that again,” he screams over and over. You can listen to the craziness below:

Oh my god… I just listened to a voicemail from an @Uber driver from when I had to cancel. He shouts "Cancel again and I'll cut your neck!"

— Anna Kealey (@annakealey) July 8, 2015

Uber was quick to respond, to its credit.

@annakealey That's completely unacceptable. Please get in touch at http://t.co/balq3Eyso6 so we can follow up ASAP. / @UberUKsupport

— Uber Support (@Uber_Support) July 8, 2015

Update: I've met with police and filed a report, @Uber @UberUKsupport are cooperating. Not going to sue, obviously. Just want it made right.

— Anna Kealey (@annakealey) July 8, 2015

Uber has suspended the driver and said it is cooperating with authorities.

“We have spoken to the rider to ensure they are OK and encouraged them to report this the police. The driver has been immediately suspended, as is our policy, and we are investigating fully,” said the company in a statement.

Every time a story like this pops up, Uber’s business model comes into question. The company’s employees contractors go through a background check, which Uber calls rigorous. But that check has let plenty of bad apple get through. Of course, it can’t be perfect. That’s an unrealistic goal. But Uber has made multiple promises to make the service safer. With every driver harming or threatening to harm someone, it calls into question whether of not it’s really capable.