Yes, it's only funny when you play the dumb/silly guy and people know "Paf le chien" (which is already absurd). French people usually pronounce Path and Paf in the same way and "Chemin" and "Chien" sounds alike.

What usually happens is the IT guys look at me, sighing and non verbally confirm to non-IT people that the joke is way too stupid and geeky to explain.