The 600m dash is an indoor track running event. The people that run it are crazy because they can expect to at least throw up soon after finishing. You sprint for 600m and die at the end. And then for some reason the next time your coach asks who will run it, you volunteer, completely forgetting how shitty it is.
"Who wants to run the 600m dash?"
Runs the 600.
Comes back to life and volunteers again for the next meet.