Until I got home. And discovered it wouldn't charge. Or turn off.
I admit, I panicked just a tiiiiiny bit, then. I poked and poked and prodded and poked and eventually took the back off and pulled out the battery. (Yeah, I know, if something around the power button was broken, that'd have been really stupid, but I wasn't thinking about that.) Put the battery back in, and the phone would turn on and off! Yay! ...But it still wouldn't charge. Woes. So I pushed and prodded at the battery and messed with the charger cord until it FINALLY started to charge up. Gah, that was so annoying.
I think I need a new phone. -_-;