one quick update: One test I ran after my previous post has changed the
picture a little. Instead of being punched by an 8 year old, think more
like a gorilla. The size of the hole makes a dramatic effect on the
acceleration. A 1mm hole is enough to produce scarry acceleration. Ok, so
this IS dangerous. I will now be thinking of ways to slow the car down.
Still more fun than you can shake a stick at though.