Exits are quicker than entrances.

Arrive with care, leave out of the way.

Animate transform and opacity.

Layout properties make the browser redo work every frame.

Skip what people do a hundred times a day.

Frequent actions should feel instant, not animated.

A quick flick should be enough.

Judge a gesture by its speed, not only its distance.

Nothing appears from scale(0).

Start near full size and fade in instead.