I'm sure a lot of you are aware of sites where you can make funny pictures online. Some of the more popular ones are:
Funny Photo Effects
Face in Hole
... and many more.
All you do is get a photo of your buddy, and slide it behind a mask of your chosing.
Here, let me show you what I mean.
I'll just pick a photo at random from the Internet to show how it's done.
Now isn't that fun!