Idea for Obama to chalenge Rmoney at the next debate!

When Rmoney blurts out another of his many absurd lies, Obama could challenge him on it, when Rmoney doubles down on the lie, Obama can challenge him to a $5 bet on it. This would do two things, #1 it would be a strong and deliberate challenge to call Rmoney out on his lies, #2 it would allude to Rmoney's bet of $10,000 to Rick Perry yet in a common man's betting ammount. This would remind everyone of Rmoney's former elitist behavior at the Republican primary debate at the same time stoping Rmoney's lie in it's tracks.

What does everyone think of this idea?