mine was tonight when i did an hour and a half Karate class and did like 120% and then jogged halfway home.( its about 3 miles away) *Proceeds to fall over and go to sleep*
Hmmm this may not be physical, but I once worked on a massive report about Jhon C. Fremont for 2 weeks straight, getting absoulty no breaks besides eating, or getting 4 hours of sleep a night. I got a B on the report