I dare you to make fun of these squids lol.

 

Fail x 2...

 

 

i had to look at that helmet for a few secs befor i realized she must be 100 percent pollock lol

 

^That's just the Darwin Award waiting to be handed out.^

vSquidly bike killer.v
How to Kill a Motorcycle - YouTube

 

can someone explain why the engine just blew up like that?

 

Prolly a fuel leak somewhere.

 

To follow up on the previous movie, found this a couple of days ago.

cbr600 crash on dyno - YouTube

 

My assumption as well.
As far as the donkey comments; with his reaction, lack there of, leads me to think it wasn't his bike... IDK the story to this though.

 

Free revving a motor like that is hell on the internals - those parts and pieces are designed to be under a load. When you run it up to redline and then let off like that, the whole system starts freewheeling very awkwardly from a NVH point of view. Without the intended loads you can have some of these internals develop resonances and vibrations that they aren't designed for.

I'd be willing to bet something happened like the guy floated a valve, or something in the valvetrain came apart. But it isn't uncommon for drag racers to sit there on the line bouncing off the rev limiter and have a piston come out of the block - sometimes taking body parts with them.