When I was 6 or 7 someone had fixed their sidewalk and roped it off with very thin rope.And of course I came wailing down the sidewalk,got me neck high.I can remember laying there thinking WTF just happened.The old bastid came out of his house and scolded me for marking up his concrete.My father had a nice conversation with the geezer.The old guy came by the house later with some ice cream for me and apologised.Wasn't very sincere as I recall but dad rode a Harley and had a few tattoos from his WW2 navy days.He could be persuasive if needed.Left a scar on my neck for a few years.I had forgotten all about it until I read your post.If it happened nowdays it would be on the news,lawyers and lawsuits.