When I was a kid I thought that parachutes were probably standard equipment on a light aircraft. They'd be stowed under the seats (I thought), and in the event the aircraft came apart or exploded, you'd simply grab one, strap it on, and leap to safety.
That seems to me to be about the level the OP is coming from.
The idea of jumping out of the average GA aircraft following a middair or fire would be desirable -given the obvious alternative - but tantamount to impossible, unless you were in a type with a canopy or doors that can be jettisoned. Even then, I reckon it would be a difficult operation. And if you were below about 100 seconds plummet altitude, forget it.