Taking inspiration from Day 2 of this year's Physics in Advent, I filmed a milk droplet in slow motion as it dropped into a glass of water.
Above shows the drop falling.
Next it has just hit the surface of the water.
Now it goes a little way down into the water, opening up an envelope in the surface of the water.
In this final picture the white drop has started to go up a little way. The solution film for the Day 2 question shows it much more clearly. They must have a better camera, and their drop bounces much higher. The reason they give is that the surface tension is strong enough to push the drop back up. There must be elastic stored energy in the distorted surface that can then be transferred back to kinetic and then gravitational potential in the drop.
