I hated it up until the very end, when the clown ended up being the Karate Kid guy. I didn't see that coming and it was *AWESOME*. Too bad the rest of the episode sucked.
The absolute only thing that saved it from being my most hated episode was that the clown turned out to be Johnny. That was a really good payoff.
Other than that ... ugh. I saw it coming from a mile away that they were planning a crappy bachelor party on purpose, and that Robin had a hand in planning it. And it was just really obvious the entire time that everyone was acting in a show - nothing felt anywhere close to natural.
And, really, why wasn't Robin running for the hills when she knew that the MAN SHE IS MARRYING would blow her off and leave her stuck with his mom at dinner, AND throw her under the bus in the process by telling his mom that Robin disliked her, AND that he'd piss away $5k in cash that was supposed to be their reception hall deposit??? She was willing to overlook all of that simply because she was playing a joke on him???
WTF happened to cool, confident, season one Robin? She never would've stood for this bullcrap.