Try this one...

We heard a brand-new excuse from Andrew tonight, that might come in handy for you sometime if you just don't have the energy to do what you're supposed to be doing.

He was supposed to be climbing up into his bunkbed, and was majorly procrastinating on bedtime. Finally Mark just asked him why he wouldn't climb up.

Andrew: Because I have too much food in my feet.

So if you're too tired to do something sometime, see if this one let's you off the hook...