Three Irishmen and leprechaun joke

One day three Irishmen were out for a walk. They met a leprechaun. The leprechaun said they had one wish each; if they went down a slide, anything they wished for turned into a pool of it.

The first Irishman went down and he wished for money so he landed in a pool of money.

The second Irishman went down and he wished for Guiness so he landed in a pool of Guiness.

The third Irishman went down and he just said "Wheeeee!"