Being funny is easy. Telling a funny joke is hard as hell. Don’t believe me? Ask a group of people who the resident comedian is, and ask him or her to tell you a joke. Chances are they will stumble their way through it, earning a few awkward laughs in the process.
Benjamin Franklin nailed it when he said, "Fatigue is the best pillow." True story, Benny. There's nothing like pushing your body so far past exhaustion that you'd willingly, even longingly, take a nap on a concrete slab.