Not a joke, but a good story:

When I was in high school, a bunch of us were camping out at one of the state parks. Sometime in the night someone woke up to the noise of something snuffling around the campsite. He yelled and woke up the rest of us, except for one of the guys who complained about us making too much noise and snuggled further down into his sleeping bag. Flashlights clicked on and it turned out to be a racoon rummaging around where we had our hotdogs and other food.

We all sat and watched the racoon walk around the campsite checking everything out. Great big old gray racoon, and it wasn't worried about a thing, just taking his time. After a while of watching him, it almost got boring and the conversation just turned to regular teenaged boy conversation while we sorta kept track of where he was. Next thing we know, the racoon shuffles up to Ricky's sleeping bag (the only one of us still sleeping). Before we could do a thing, the racoon opens up the top of the bag and goes right in. We were all kind of "this is gonna get good/horrifed" speechless. We could see the lump of the racoon going to the bottom of the bag. Then, from out of the bag, we heard Ricky "You guys just won't let me sleep and I'm about to get pissed off!" Then someone started it, whispering loudly "Ricky....there's a racoon in your sleeping bag". Within a few seconds we're all doing loud whispers for Ricky to get out, "....there's a racoon in your bag."

Then Ricky, still deep in his sleeping bag says quite loudly "I'm about to kick someones ass!" Then Rick's head pops out of the top of the bag as he sits up. He looks down at the bump of the racoon at the foot of his bag, he looks around at all of us kind of confused looking. All of a sudden he realizes that we are NOT messing with him and it really IS a racoon. He shot out of that bag like it was a cannon shooting a high-pitched girl screaming cannonball.

All of the noise and commotion made the sleeping bag shoot a second furry and scared racoon cannonball out right behind Ricky. Ricky didn't slow down till he hit one of the trucks, and the racoon fired off through the underbrush and trees headed towards the next county.

It's still one of my better camping memories.