How long can you stand on one leg without the aid of anything or anyone?

Crutches limit hands mobility a lot so while having a non-weight bearing right leg,

during my morning and evening routine, which usually lasts 20-20 minutes, I stand in front of mirror for about 20 minutes each time on just one leg without crutches or anything.

Have never had a necessity to stand on just one leg, so had no idea I could do that.

How long can you stand on one leg without the aid of anything or anyone?
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