My wife doesn't understand

I was watching "World's Funniest Commercials" on TBS last night, and this commercial was one of the ones I thought was particularly funny:

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However, my wife did seem to understand why I thought it was funny...she thought it was just dumb (which is why it's funny, IMO). What do you think?

[edit:] I don't know why it won't embed the video. I've checked the tags and the link, and it should be working, but it isn't, so here's the direct link to the video: http://www.youtube.com/watch?v=-rGMz3JFmG4