Stare at center of the left square for about 30 seconds, and then shift your gaze to the center of the right square. Then, while still staring at the center of the right square, move your head toward and away from it. Trippy!

And just how many "trips" have you taken, grasshopper?

Yes, thank you for making me feel drunk at 9 in the morning.

How mant "trips" have I taken? About 10 times as many as yours, then multiply that by 0.

Well, lemme see. 10 x 0 = 0. Then 0 x 0 =...............whadaya know? You've taken the same number as I have.

Hey, normally that costs money. It's like a public service!

In that case, Peter is doing his civic duty. A fine upstanding citizen he is.