You can see these water striders (Gerridae aka water bugs, magic bugs, pond skaters, skaters, skimmers, water scooters, water skaters, water skeeters, water skimmers or water skippers) in the ponds of Golden Gate Park. Like these two, for instance.
You can tell when they’re on the water by the dimples near their legs. Click to expand:
And you can tell when they’re jumping when you don’t see the dimples.
Jump on, little bugs.