Problem with Window?
On BART this morning around 7:30 from Fremont to Richmond I was sitting next to the window when suddenly a lot of air starting coming in from around the windown, between the black rubber seal and the metal frame. Is this normal? I didn't notice air coming from the vents.

There's always air flowing
There's always air flowing between the black rubber seal and the metal frame. I often rest my head on the ledge in front of the window so that's how I know.
That's actually where part of
That's actually where part of the HVAC air flow goes to keep the windows from fogging up.
on really hot days i'd rest
on really hot days i'd rest my forearm on the window sill and let the cool air go up my shirt sleeve to stay cool. sometimes i'd be downright cold and i could see others around me sweating and fanning themselves with "donate money for my basketball team/crack habit" flyers. ahh, good times.