I live in Chicago and happens all the time during winter.
I try my best to let it warm up, which would remedy the problem, but sometimes, I just can't wait and it does happen.
It is almost as if the air is not getting sucked into the engine for a brief moment, right???
Once, when it was like -15 Farhenheit, it chocked and stalled.
I woluld definitely, like to find out what causes that...