How Do I Know God Exists?

I wouldn't call it one of the most important questions I'd ever ask, but it is an interesting one.  Brought to you by Ray Comfort, the man renowned for his impassioned speech some time ago about the Atheist's Nightmare: the banana!  Now, that's not the entirety of his speech - and I say this because he got a bit riled up about people missing the first half - where he shows off a soda can and points out how it's got a tab for opening and the like, and how it's proof of a creator.  Well, that's fine and dandy, but if you watch the linked video with a horticulturist, they might have something to say -  that delicious yellow fruit we eat today was, in fact, selected and bred by man to make it more palatable - easier to grip, and the like.  The original banana was a rather distasteful looking thing.
So, what does this mastermind have for us now?  Well, we shall just see.