[dmonitor]

It's the unofficial "where's my mouse pointer" macro

At least one DE I've used (MacOS? KDE?) even had it as an official macro that would make the pointer 10x bigger when you shook it

[crabmusket]

MacOS and KDE both do this. In KDE the pointer keeps getting larger the longer you shake it until it is truly absurdly huge.

[cevn]

This might be the new Compiz, my friends love seeing this effect on KDE.

[scblock]

KDE does that by default. Handy sometimes, funny sometimes.

[mkl]

If you keep on shaking the mouse, the pointer just keeps getting bigger and bigger. You can certainly find it when it is enormous.