Explaining the Offside Rule ... to Elmo

We've all been there.


You're either: A) Trying to bring it down to a young'uns level without any idea of whether simplifying is possible; or B) not realizing how deep you dug the hole before you had a chance to explain yourself.


James Corden of The Furchester Hotel gets into both predicaments trying to unspool the offside rule into digestable form for everyone's favorite (furry) 3-year-old.


Note I once gave a 30-minute, all-encompassing historical discourse breaking down the MLB box score before the girl I was with let on that I should just kiss her already. Patient, that one.


What's the most tongue-tied you've ever gotten over something you thought you were able to easily explain?