I had a similarly funny experience this weekend at the con I took in. I ran demo games on Friday and Saturday, and the moment occurred during the Friday game. Commando player was down to the last trooper, and the Fiend got behind him in a doorway, only to roll snake-eyes in HtH with Trident. Didn't much matter as the Machines won Initiative the following turn and rolled a 5 and 6 to finish the deal, but for that fleeting moment it caused quite a laugh.
"How the h*** down a machine the size of small car miss a target standing with his back to him in a small doorway?!?"
EDIT: Well, I'd love to show you the pic, and others I took, but I keep getting an error when trying to attach it. Guess I won't be sharing the fun had this weekend:-(