What does your grandmother do in her spare time? Let’s hope that it’s nothing like what you’ll see this week on Betty White’s Off Their Rockers, NBC’s new reality seriesin which senior citizens exact their Punk’d-style revenge on the rest of us.

In this sneak-peek clip from tomorrow night’s episode (8 p.m. ET), our young mark is approached by one of our regular pranksters (Reatha Grey), who claims to be a newbie responding to his granny fetish ad. Click on the video below to enjoy some awkwardness that crosses the generation gap.

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