Zeraph

So I'm getting older (25) and my dating pool is more through friends and meeting people at stores and such. Normally I'm fairly quick to pick up on signals if she's interested but lately I've come to a confusing situation that's happened several times.

The gist of it is that a pretty woman will bump into me (or my cart) and say "Excuse me." This is generally preceded and followed by circling and most likely checking me out. It often happens in a section that she seems not to have any business in (like men's department) that she soon leaves after the little encounter without having really looked at anything or picked anything up. Hence my likely suspicion of the intentional bump. Sounds fairly standard stranger meets stranger, now to the conundrum. The last couple times they just haven't made eye contact (like I'd expect of someone interested) so perhaps its all a coincidence. But so far 9 out of 10 bumps are from pretty girls so either they tend to be much more clumsy than the general population or this is a tactic I haven't known about :P

1. Do you think this is in my head or are these shy girls trying to spark a meeting? 2. Regardless of 1, what's a good ice breaker after she says "excuse me" so I'll have something to say besides, "no problem?"