It's a dangerous gambit, especially as Prometheus is not telegraphing which foot he plans to kick with. Thor will have to decide that at the last possible moment, right when he is within perfect booting (or sandaling, in his case) range. The Titan gets ready to strike --

Ah! Thor chose right! The heel strike on his left foot causes Prometheus to stumble. Darn heels! He rights himself quickly, but by then Thor is free to make his escape.

Prometheus narrows his eyes playfully. All right, all right, no more Mister Nice Titan! He spins around and stomps his foot, hard enough to make the entire field shake. He's going to try to herd Thor out of the ring again, but he keeps his center of gravity lower in a kind of hunched-over, loping gait. No more sneaking past him this time!