This scene always reminds me of when you were a little kid on the playground, playing a shoot'em up game, and you would shoot some other kid with your imaginary gun and the conversation would inevitably turn out like this:
You: "Bew bew. I got you!"
Kid: "Nuh uh. I have a force field."
You: "We're playing cowboys and indians, you fuckhelmet. Where'd you get a force field? Doc Brown?"
Okay...maybe that last line was a bit of whimsy, but the other part is a true story.