I'm a pretty messed a flower, but good at comedy just by being stupid, which I am all the time. If I find something that surprises me, I'll repeat what you said and then say "OH MY GOD!" and the end of the sentence. For example, if you say, "I won twenty thousand dollars," if it surprises me, I'll say, "YOU WON TWENTY THOSAND DOLLARS, OH MY GOD!"