Your bus can be raised and lowered to allow passengers to more easily enter and exit. If an elderly woman makes two attempts to climb onto the bus, fails both times, and nearly falls over on her second attempt, this might be a sign that you should lower the freaking bus.
The hippie chick whose grandma would've delivered a righteous smackdown upon your sorry ass if she'd been trying to board your bus.
(I'm very good about respecting people's personal space on the bus, but in this case I was standing right behind the woman with both my hands out, like catching a trust fall, in case she went over backwards. Because it absolutely looked like she was going to.)