My wife and I watched this episode last week... She laughed non-stop for 30 minutes. Once the guy said "On-the-Spot Dicespin", Im pretty sure she pi$$ed her pants.
It was on in the background and I saw it from the kitchen and I hear him mispronounce Achilles badly and flip out. Go on to watch him look like an idiot the rest of the way and somehow still win. Priceless.
I did feel sorry for him after the first flub; the look on his face was one of "Man I wish I could disappear right now".
His last 2 though...I don't know what he was thinking. He was seemed to be going for "Car" in the second one, but the category was Person so that should have been his first clue, plus if it were "Car", he already had asked for an "R". I guess he could have been going for "Cat" but that's still silly . And "Dicespin", I'm guessing that sounded ridiculous to him about a second after the word came out of his mouth.