Certain old men prefer to rise at dawn, taking a cold bath and a long walk with an empty stomach and otherwise mortifying the flesh. They then point with pride to these practices as the cause of their sturdy health and ripe years; the truth being that they are hearty and old, not because of their habits, but in spite of them. The reason we find only robust persons doing this thing is that it has killed all the others who have tried it.
Einstein didn't speak until he was four, leading most of his teachers to believe he was crazy. That is until he whipped out the theory of relativity. BAYUM! Showed you guys.
The easiest time to be funny is during a fairly serious situation. That way, you can break the ice. It's crazy, but even at funerals, people will get huge laughs.