I bought this Hot Wheels radar gun, linked above, on the way home for $20.99. I expected a cheap POS toy. While it really isn't, although it weighs nothing, I wouldn't expect it to tak much of a pounding...but it's one of the most fun things I've ever ****ed away a twenty on. It will give speeds either in 1:1 scale or 1:64 scale. I haven't tried it yet on fast objects. I can tell you that in scale speed the ceiling fan in my office does mach 0.43! ((331MPH/64)=5.XX actual MPH) I have ZERO, and El Dubb means ZERO, doubt that I will go supersonic when I catch my break speed! (1:64 scale to be sure...(771MPH/64)=12.05 actual MPH.) http://www.toysrus.com/product/inde...gun&kw=hot wheels radar gun&parentPage=search LWW <---Doesn't wanna grow up, is a Toys-R-Us kid!