Started peddling up a hill from the apartment when it got steeper, so I shifted from middle ring low gear to little ring, low gear. The resistance was way too light, the chain slipped off. I coasted back down to the apartment expecting it to be a major ordeal, but I just squeezed the derailer a little and it slipped back on easily.
Is it safe to ride like this. Is the chain popping off something that is just a fact of life with multi-speed bikes?