[snoel]

In high performance engines (when "dumping" the clutch at high RPM), the flywheel can shatter/explode. When it does, it usually comes right through the floor pan, and other things. Which lines up with your feet! The smart people, install shatter shields.

A friend shattered his, in a 59' Chevy 348, just turning around (aggressively)
The RPM was not high enough to cause the parts to destroy the bell housing, and other things
.
Machinery is wonderful stuff, but is dangerous. A friend's wife backed over her 8-10 year old son in May, cutting his foot nearly off. $90,000 later his foot is still a mess. She's carrying a huge guilt trip, her son is a cripple and dad may loose the farm. Please watch for your little ones. They don't always realize the danger.