High-flying UNO commit Zach Thornhill lights up dunk contest

If you thought Zach Thornhill's windmill and between-the-legs dunks were impressive, wait until you see his behind-the-back slam.

Thornhill drew four perfect scores en route to winning the Kansas vs. Missouri All-Star dunk contest Friday at Rockhurst University in Kansas City, Missouri.

A senior at St. James Academy in Lenexa, Kansas, Thornhill committed to the Mavericks before ever watching a UNO game.

Check out the video below for all four of his slams.

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