You could be needing some sugar rush or caffeine to shake you up. Otherwise, you take your 15 minutes break and go to the lunch room to get a 15 minutes (40 winks), go to the bathroom to wash your face, touch up your make-up or take a brief walk *
I will go to the coffee room and get a cup of coffee or cacao. and I know how u feel. sometimes I sit there and wish I could just crawl under the table like George costanza