Depends really.
It's normally either "shit, do I have any food left?" or "I wonder if I can afford ...."
( WHARRGARBL, Thu 18 Jun 2009, 10:38, archived)

I always end up thinking things like
"how long can I go on at this pace..." "if I stop abruptly it'll look a bit weird" "maybe i should slow gradually to a stop"
( mike woz ere 7442200 & 7696970 getter, Thu 18 Jun 2009, 10:51, archived)