I came across this after the fact, but could imagine quite well how the situation ensued. It is no secret that the coaches do frequent sessions of friendly trash talking to get each other going and raise the bar. Lord knows Jorge and Diana, being the lovely husband and wife team that they are, are pretty damn competitive. I imagine it happened like this:

Adriana looks at the board and says, "Pistols  huh?"

Jorge then proceeds to challenge her and says, "Adriana, I raise you twenty pounds."

Adriana throws her head back in laughter and says, "Jorge, I see your weighted pistol, and I raise you a weight vest." Jorge nods and says, "let's do it."

And the rest, as they say, is craziness.