Check this, Bikers in Trouble, Hectic Road Bike Crashes and Motorcycle Mishaps!!!
There might be hundreds of videos and different tutorials on how to ride a motorcycle, however there are many videos that teach you what not to do on a bike as well.
This is of the latter, so whatever you do, don’t replicate what you are about to see.
Most of the video you are about to see had the excess speed to blame, but some of them are purely guys showing off on places where they should have never thought of doing so.
These kind of maneuvers are dangerous to be done on a closed road, and even worse if you try to do any of them in traffic, to which some of these guys will attest.
So sit back relax and play the video so you can watch these guys as they destroy their machines trying unsuccessfully to show off to their friends and the rest of the people on public roads.