Another near puke

8.4 tempo run in 54:49 (6:31.5 ppm). Did the 4.2 loop around the block twice. First loop was 27:30, second loop 27:19. I ran hard the last half mile to try to break 55, and that made my stomach a little uneasy at the finish. First mile of first loop was 6:30 flat, first mile of second loop was 6:30 flat. Made it to the corner of streid and irish grove in 19 minutes flat on the first loop and 19 minutes flat on the second loop. Ran really even pace the whole way. Best morning yet for running, under 60 but still quite humid.