Jogger trips over chain fence - GIF

Jogger trips over chain fence.

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Previously:

https://www.homemadetools.net/forum/...987#post198894
https://www.homemadetools.net/forum/...853#post175329
https://www.homemadetools.net/forum/...449#post222580
https://www.homemadetools.net/forum/...876#post206710
https://www.homemadetools.net/forum/...818#post194263

Chain fence looks like it’s about 3 feet away. Does he trip over a concrete step?

Why are those chains even there, unless he's running in an on-street parking area and not on the sidewalk?

It looks like he saw the second chain but not the first one.

Perhaps, the chain could have been inserted into a short section of pvc pipe for visibility.