1.   An extraterrestrial back flips off the Guggenheim Museum.

2.   Back flips and splits, not nuance, are the norm.

3.   It is a severe, racklike table that looks as if it were inviting the user to join it in a back flip.

4.   Then, I got fascinated with the art form and the mechanics of asking my voice to do double turns and back flips.

5.   Then a third young man takes a running start from the far end of the waterfront and back flips past the tourists a dozen times in a row.