Scooter rider reacts after bus cuts him up

There is NEVER an excuse to act like this...

WARNING: Extremely foul language.

THIS situation went from 0 to 100 real quick. 

While the bus driver was in the wrong for pulling out on the scooter rider, what happened next was completely unexpected, and no doubt terrifying for the bus passengers.

Incredibly, the scooter rider uploaded the footage to YouTube himself, and has since defended his actions to critics in the comments.