Due to a conflict with a middle school event both my DDs rec team and the opposing team agreed to change our Saturday game time from the normal 9 and 11 to 4:30 and 6:30. Prior to the start of the 6:30 game the field lights were switched on as dusk was approaching. The top of the 1st inning went off without a hitch but then we had a commotion just after the start of the bottom of the 1st. My DDs team was visitors and our defense took their normal positions. About a minute or two into the inning the left fielder starts screaming and runs into the infield at full speed (mental note: have coach speak with left fielder about hustling after fly balls now that I saw her incredible speed). Umpire calls time and several of us, including myself bolt, to left field. We live in an area with many critters and we have had rattle snakes, tarantulas and scorpions on the fields in the past. Upon initial inspection there was nothing on the ground aside from the grass and perhaps a gopher. The coach calls to the left fielder and asks her what was the problem. At the top of her lungs she screams, "BATS!!!!!". We look up and sure enough there were several bats above us feeding on the bugs attracted to the lights. Apparently one had swooped down a bit to close to her and freaked her out completely. She ended up sitting out the rest of the game as she couldn't get her focus back.