Immediately after peeing in the snow, one rams his unchub in the pee hole in the snow. After the phallus is sufficiently frozen and frost bitten, the actor pulls one off. Simplicity is key.
"Hey man, how'd your night go? It was so cold out!"
"Awful!"
"How come?"
"This girl rejected me, so I had some terrible blue balls. To relieve the situation, I had an old fashioned Yukon Understatement to set me right."
1: Person 1 Farts real loud. Person 2 says "that was some bunderstatement you just made" 2: After the car accidenthappened, I knew there would be a huge bunderstatement in my underwear.