The reach truck, obviously, is where one exits out the back, and not off to the side. If the truck tips over on its side, and the operator jumps, sayanora! Out the back, the issue is not as grave, as long as the truck does not tip backwards, which it shouldn't, unless the operator does something unorthodox.

Since the vast majority of stand-ups, either reach or counterbalance, do not offer seating options, my preference would be to jump out, but I am smart enough not to get myself in those precarious situations.

In the meantime, no reach trucks, as far as I know, I am a trainer and not an OEM affiliate, have no seatbelts so the operator can jump to safety, provided the truck does not fall back.