How is it that some people just take up so much room, even when they're small?

I was trying to get past an average sized woman who was walking in front of me down some steps and I just couldn't get past. Something about the space surrounding her body made it impossible, even though there was about a metre to the left of her.

While I'm on the subject - people who fanny around! Please just walk in a direct line to where you're going and walk to the side if you're going to be slow about it.

Ahh. That feels better now.