Average Guy is lifting weights and he tells Doc to say when. Doc is clearly not listening to him because he is lost in thought. A.G. says when for himself and puts the weight down. He awaits further instructions, but the Doc is still thinking. Finally, A.G. clears his throat and the Doc tells him to do "thirty-five miles on the treadmill." A.G. says he's tired of working so hard and not getting any "brownie points," and suggests that instead they do "mental things." He hauls out some old brain-teaser chestnuts. Just for your amusement, here they are: A plane crashes on the border of New York and Pennsylvania. Where do you bury the survivors? The answer is nowhere because you don't bury survivors. A.G. rattles this off without even giving the doc a chance to answer. The second one is that a guy is found stabbed in a cabin in the middle of the woods in winter, and next to the dead body is a puddle of water. What was the murder weapon? The answer is a knife made of ice, which then melted. The Doc looks about impressed as I am with these puzzlers. That is to say, not at all. The Doc suggests they call it a day, and they both get up to leave. The Doc stops and starts recounting the vignette we saw earlier about a woman, whose husband claims she is deathly afraid of heights, who climbs a three-hundred-foot tower and then lets go, and falls to her death. The impact was so great that there wasn't enough of her brain left to study. Gee, thanks for the gory details, Doc. A.G. makes fun of the Doc for being so interested. Doc says that fear serves as an inhibitor, and that without the presence of alcohol or drugs, he wonders what happened in that woman's brain.