Coworker & I keep bumping into each other in corridor (literally)?

It happened 3 times in the space of 4 hours today. I mean literally bumping into each other. He's quite shy around me compared to other women, and I've noticed when he talks to me he looks down/ away to the side, but holds eye contact with others. What's going on lol.
Coworker & I keep bumping into each other in corridor (literally)?
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