It's good to want to rescue others.
Gary was walking by the lake in the park when he saw someone fall in.
Gary wants to watch the person in the water.
Gary watches the person until they go under water, then he jumps in to save them.
Gary watches the person as they go under water and then walks away.
The person in the lake is very grateful that Gary has saved their life.
The person in the lake doesn't know how to swim, and they drown.