2 Man Fly ball/line drive mechanics with runners on 2b/3b: Tips?

[teebob21]

I had an assignment yesterday with two mismatched college teams. As a result, I spent most of the day in C position and a bunch of balls got hit over my head.

Anyone have any general tips for first movement when the ball goes over your head to left-center? The CCA manual wants you to stay outside on a single, but come in on fly balls and line drives. A few times, I felt out of position during the play whether I came inside the diamond or stayed out. (I might have been coming too deep towards 1B on balls that ended up getting caught.)

Should I read "single" to mean a sharp grounder to the outfield? Thanks all.