OH MY GOD! Are you alright? Did you file a complaint to Metro?

Er...don't really know how to avoid that, because it really should be the drivers' responsibility to check that all their passengers have all gone down before moving. I actually had a similar incident a while back, but instead of alighting, I was getting my bike from the rack when the driver started moving and he nearly ran me over. I wrote a stern email to the MTA and filed a complaint saying they should tell the drivers to WAIT and LOOK for any passengers still around the bus before moving.