I use "hold on to your butts" all the time.

The blooper that bugs me every time I see it is when Laura Dern turns the power back on. She leaves the shed, closes the fence and leans against it. The fence has one of those "Warning High Voltage" signs on it. Shouldn't that fence have been electrified too?

I still remember being in the theater when the T Rex looks into the jeep, when the light hits and the pupil changes.