'Punk'd': 'Glee' Star Dianna Agron Helps Creepy Grandpa With His Erection Problem (VIDEO)

Hayden Panettiere took the reins of "Punk'd" (Thu., 10 p.m. ET on MTV) to target her friends, like Snooki, Zac Efron and Dianna Agron ("Glee"). While she went a more straightforward approach with Effron, convincing him he was getting arrested, and Snooki, who wound up in the middle of a lovers' quarrel, things got a whole lot stranger when she turned her attention to Agron.

It all started innocently enough, when Agron was asked to look after her friend's grandfather for a little while. The old man started talking about how attractive she was, and even flirting with her a bit. All of which Agron found charming and innocent, until suddenly he started calling her Julie, an old lover's name, and visibly getting excited.

It was at this point, Agron was advised that the excitement was a strain on his heart, and suddenly she found herself utilizing some kind of a pump to relieve the pressure. It was all very bizarre, but Agron fell for it hook, line and sinker until Panettiere ran out laughing.

Find out who's in charge next as "Punk'd" continues Thursdays at 10 p.m. ET on MTV.

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