I've pegged mine at +/-45 in pitch and kept going. I give up when the tires start wanting to lift off the ground. Going up be ready to slam the transmission into reverse and give it gas. Sometimes that can keep you from rolling over. Going down hill be ready to goose it if the back feels like it want to flip up. It sounds like you got lucky.

Brent, didn't you have the old pathfinder drawing of the tipover angles.