While we're talking about things that would be funny, I came up with another one.

What if, and I'm saying if because this would never happen in real life, but what if you'd been working somewhere for like 2 months and they still hadn't given you a name tag so one day you decided to wear Jen's name tag and the first customer you saw made a point to learn your name and when she called you Jen you gave her a funny look because you forgot you had the nametag on and then a co-worker came in and called you your real name and the bride got all confused and said she thought your name was Jen and you had to make something up to cover your lie?

Yup, pretty funny, and a little awkard too. Maybe you should wait for your own name tag, huh?