You know you've been in the shop too long this weekend if:

[KTorak]

...when you spend more time working over the 4 day weekend on the robot than you would in a normal week
...when you have a member of your team say he'll be home in 2 hours (10pm) and you drop him off at midnight....and he forgot his keys so his parents are mad at him
...when you leave school and realized you'll be back again in several hours
...when your normal dinner time is 12am, breakfast at 6am, and lunch at 11am.
...you hear sirens from some where and become panicked becuase you think neighbors across the street called the cops becuase they saw 5 cars at school at 12am.