Who is guilty?

The biker. Obviously 🙄

Biker for sure!

Insane early stunts.

🤔

Clearly the one on the bike who crashes into the red car and clearly not paying any attention on the road.

that motor guy is probably high, or blind

Motorcycle fault , following too close.

Motorcyclist. It is immaterial *why* the car stopped. In all reality, the motorcyclist appears to have made zero effort to even slow down let alone stop.

Scooter bill of course

The guy on the bike needs to open his eyes.