Although swimming is certainly a useful skill, the amount of good that it can do for you depends a lot on how much water you're surrounded by.
Because while panic and a lack of swimming skills are surefire ways to make a sudden drop into water perilous, it's easy to underestimate just how quickly exhaustion can set in and how badly it can affect your attempts to save yourself.
For this reason, one man has taken to TikTok to show us a trick that could potentially save our lives.