Arnold wants to crush stuff for charity using his own M47 Patton tank.
He also offers a chance to people giving money to charity to ride his tank and crush things with him.
Freerunning stuntman and tumbling master Damien Walters attempts the first ever human loop the loop. After several failed attempts he finally manages to perform one just like Sonic the Hedgehog would.
... and is found intact 8 months later by a farmer.
Here's what the camera recorded (don't miss the end!):