When Dr. Pain's switched to a Twisted Carnival for its 5th year anniversary, it was a bit hard for me to come up with clown lines.
Really, I could conjure up was, "Sheepies! 'O Sheepies! Stay and play, sheepies! Stay and play!", "I like candy!", "Corn Flakes!", and "Give it back! I know you stole it! I-WANT-IT-BACK!" even though they didn't take a thing. Then again I didn't have an assigned room to exploit so that gave me limited material.
Here's a gag, remember the handkerchiefs out the mouth trick? Here's how you can end it with your own intestines coming out: Take a long piece of string and cover it with Great Stuff Foam so it looks like a long, bumpy, foamy sausage. When it dries, spray paint it with red and some black for depth. Then tie handkerchiefs to the end of the intestine. There you go. Just shove that up your sleeve, put your wrist up to your mouth and start pulling the handkerchiefs out with the other hand. Made gagging noises for effect.
If you have a rubber chicken: "Hey, you like chicken?....Well I hate chicken!" Then slam the chicken on the ground, stomp on it, and kick it away.