A few years ago, I was with my youngest son, then aged about 2, on Blackpool beach with the tide nearly in.
Someone was a couple of hundred yards from shore and clearly in trouble. Someone had called the coastguard.
Then the first rescuer turned up, a young woman. The rest of her team were in their Landy, driving down to the beach. She spoke into her radio "Going in, need assistance", stripped off and was gone, she was an incredibly powerful swimmer and reached him very quickly. 2 of her mates went in, wearing lifelines, and between them they got they guy back.
There were two excellent shots there, the rescue itself and the look on her face when she got back to me (I was looking after her clothes and radio), which was just like the look on a woman's face just after she has given birth - it was wonderful.
But I couldn't take a single shot because by now the tide was almost in and it had become dangerous, and I couldn't take my eyes off my son for a moment.