This joke actually works better in real life but I'll give it a go.
"My cat will now fly across the room and land in that bucket of water ... with a little help from me."
Mrow
Mrrow
Mrrrooww
Mrrroooowwww
Mrrrrrooooowwwww (sounds of cat spinning faster)
Mrrrrrr ..... ooooooooooooooooooo .....wwwwwwwwwwwwww ... (sound of cat flying throug the air)
... splash