All people have different skills, talents and abilities, and, of course, there are some general things that all of us can or can't do. We can't fly, we can't see in the dark, we can't understand animals - all these things are absolutely clear. But have you ever wondered about some hilarious things that we are actually unable to do? How about trying to laugh without smiling for at least a few seconds? Sounds more than possible, but in fact it proves to be one of the most difficult things for us. However, it's also one of the most hilarious things either!