An upside-down three on the track
Setting up a running track is not rocket science. The biggest issue would be to ensure the lines are straight. Anything else seems quite simple to achieve. But, the mistake in this picture is hard to see on a first look.
It is not something big or noticeable. The problem is that when you see the number three upside-down, you just cannot stop looking. In all fairness, three is a number that can be easily confused from either side.
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