We're not quite sure what is happening or if that's alcohol in his hand (we hope not), BUT man be careful people!
Wear your seatbelts and don't have friends like this guy.
We think he pressed the brakes on purpose and then just laughed at his friend like it was no big deal, but dudeeeeeee that was a big hit!
You heard it & felt it! Poor dude!
And hopefully he has insurance and can get that windshield fixed for free.