Magic it is the most basic kind of joke you will come across, it's basicer than the classical basic joke of "why did the chicken cross the road?". I'm surprised you couldn't understand such a basic joke. I love the word 'basic'.
Reminds me of a joke, probably all heard it, I may have already posted it in the thread a long time ago but oh well.
Why did the woman cross the road?
Who cares why isn't she in the kitchen.
Why couldn't the woman cross the road?
The chain tying her to the kitchen sink wasn't long enough.