The passenger in the car wasn’t too stoke with her bf racing motorbikes on the highway in Mexico, but he didn’t want to listen to her. She took matters into her own hands by pulling up the hand brake, mid-race. Unless you’re a rally driver or cast member of the Fast and Furious franchise, pulling up your handbrake while driving is really not advisable.
Travelling at quite a speed, she just goes for it, causing the wheels to lock up.
The result is pretty much as bad as you thought it would be – especially considering that it looked like he was showing the bikers some things.