Creeping Out Strangers

Yesterday when I left work I walked out the door right as another girl was walking past. She was going down the same path that I needed to go which isn't a very highly travelled path and has pine trees throughout. She was walking the same speed I walk at and was only about 5 feet in front of me. But instead of picking up the pace and passing, or slowing up, I just kept nipping at her heels. Even though the sidewalk is plenty wide for two people, she kept walking in the mud/grass so I would have room to pass, which I never did.

Why was this so amusing to me? I don't know. But, I admit to creepily smirking the entire time: