Going along with the 'Jesus' theme.
In the early modern period, people use to kill 'witches' either by hanging them or burning them.
A way to find out if they were indeed witches was to shove them in water. If they were to sink in the water it would mean the water was accepting them, however you'd be most likely to drown.
If you were to float, the water would be rejecting you, meaning you were indeed a witch.
Either way you die.
Anyway, my point is:
Jesus can walk on water.
(Yes)
Meaning the water is rejecting Jesus.
(Gasp)
Meaning Jesus was a witch!

(I guess this is more of a conspiracy theory than a joke but never-mind)

//for those of you who may be religious - I don't think Jesus was a witch x\\