Here is an expression for having a marker trigger a squish and squash. Put the expression on Scale.

In this video tutorial, Eran Stern reveals the first text trick in his series and shows how to design an audio waves animation with the After Effects Text Tool.

This expression allows you to “drop” a layer from the top of the screen and have it bounce in
the center of the comp as if tied to a string, with a bounce decay control.

This is a variation on the pendulum expression.

Keyframes were applied to Jack's position at frames 0 and 1 to move him out of the box

The Difference Matte effect creates a transparency a mask or a matte by comparing the pixels in a source layer with the pixel in a defined difference layer, and then keying out (eliminating) pixels in the source layer that match both the position and color in the difference layer.