Theatre! Drama!
A one minute monologue... you can try something from Albert Camus' The Stranger... or something from Ionesco, not a complete monologue but just a little excerpt from a character's lines. The good thing about Ionesco is that you don't even have to be normal: you can be as strange and loud (or quier) as you want.
Of course, Shakespeare's a classic, but it's difficult.

OH. Wait. The Wicked Witch from Sleeping Beauty and the Witch!!!!!!

So, looks like everyone is having a marvelous time. Hello, good to see you. Nice to meet you. Hi there, I’m the Wicked Witch, here’s my card. Let’s do lunch sometime. Ah, and here’s the birthday girl, surrounded by all of these gifts and her good little fairy friends. And here’s King Jonathan and Queen Jessica. You certainly invited a great number of people. But somehow you seemed to have overlooked the one person who could have been your most delightful guest. But no, no, don’t apologize. My feelings are hurt, yes, but that doesn’t mean I haven’t brought along a special gift for the princess. A brand new, never-seen-before, Curse of the Wicked Witch! “For all the tears you’ve made me shed, you’ll prick your finger on something pointy and fall down dead. And if your friends are feeling blue, in just one day they’ll drop dead too!” HAHAHAHAHAHAHA! (Runs off cackling… continues cackling looking for the exit.) How do you get out of this place? Oh – HAHAHAHAHA! (Exits.)

" . . . The sun does not shine upon this fair earth to meet frowning eyes, depend upon it." Charles Dickens