Reasons Why the Balloon Animal Guy Scares Me

I think I see the "Balloon Animal Guy" at least every other time I take my family out to eat.  He seems like a super nice guy but I when I see him, I start sweatin'.

You have to know me to understand.  I'm a thinker to the point of over thinking things.  A flood of questions pop up when I see the balloon guy.  How much do I tip him?  Should the tip reflect the difficulty level of the animal that's requested?  How does one determine the level of difficulty?  And who actually HAS dollar bills?  I haven't carried cash since I can't remember when.  See?  STRESSFUL.

How much do you tip the balloon guy?