The cars of equal length.Measure the length!

really cool

Funny effect, would be very nice if you could fix the background from the frontwindow of the last van (the first van's background looks good!). Good luck!

Edit: fixed

This one looks cool, well done author!

fall for the cat! poor thing!
bravo

Nice one!

I could not believe, but after measure the level................ it's Lovely !!!

Nice effect. Good job

Nice... I figured it out, but some instructions would have helped.

Stare at the dot for 40 seconds or so, and then stare at a white wall