Why is it that bugs of all sorts ALWAYS die on their backs?

Question

I'm sure there's some sort of scientific reason for it, but I can't even begin to guess why. You never ever see a dead cricket or cockroach right-side up unless it got knocked over after it had already died. What's the deal?

Answer 1

"Bugs move their legs by increasing and decreasing the pressure of their internal liquids. When bugs die, the pressure decreases, and the legs curl up. Bugs are top heavy, so they flip over."

Answer 2

Bugs only have muscles or tendons that pulls their legs in.  To push their legs out they use fluid like little hydrolic presses, they release the pressure on the fluid and the tendons pull their legs in.  When they die the fluids dry up and the tendons pull the legs in.  Thats why their legs are always curled up.  They flip over because all the remaining weight is in their bodies.