Literally! I was at my parent's house doing their yard. While doing the front section near the street. I was using my push mower along the grass, reached the end then stepped onto the sidewalk in an attempt to turn back. This is a push mower with old style spinning blades, not a motor, I've gone green.
A soon as I pushed it onto the concrete something caught my peripheral vision. I looked up and jumped back surprised. It was a commuter, back pack and all doing about 15 mph on the sidewalk (No, not a dude on a Walmart MTB ) Lots of driveways, hedges, gates on the block, not a good idea.
I sort of jumped back in surprise then he shouted, "sorry!".
I just wanted to post this before somebody else posts a "Hispanic Landscaper Almost Mowed Me Down" thread. Idiot was pushing his push mower faster than it was safe!