An Infield Fly is a fair fly ball (not a line drive or bunt) that, in the judgment of the umpire, can be caught by an infielder, pitcher, or catcher with ordinary effort and when there are runners on first and second or first, second, and third and less than two outs.

If there is a runner at first doesn't it become effective?

You can't create a forced out with runners on second and third with first base empty.

Pretty cool.

Fielder's choice, baby. And a pretty savvy choice, too.

You still have someone on first. Plus the dude picked up an error on his stats.

Am I missing something?

The runner forced out was a known threat on the bases

Pretty clever.

did he think of it on the fly (pun intended)? Either way, he was definitely thinking outside the box.

THE INTENTIONALLY DROPPED BALL RULE (OBR 6.05L; FED 8-4-1c).

This rule as stated in OBR (Official Baseball Rules – professional rules) says, “A batter is out when an infielder intentionally drops a fair fly ball or line drive, with first, first and second, first and third, or first, second and third base occupied before two are out. The ball is dead and runner or runners shall return to their original base or bases. APPROVED RULING: in this situation, the batter is not out if the infielder permits the ball to drop untouched to the ground, except when the Infield Fly rule applies.

the ball is still live. Why, I havn't a clue.