Snip

cut the thread. the berry keeps its swing.

slash sewing threads so a swinging raspberry flies into a baby crow, collecting buttons

A cut thread does not stop the berry: it leaves on the line it was already travelling, so when you cut is where it goes. Slash any thread; tap a bubble to pop it or a rubber puffer to blow.

Concepts: momentum, pendulum.

An interactive you play with one thumb, on Wundr.