Gregory's Server@aral On my Mac it is: Shift + Cmd + 4 + two goodwill wishes to Tim Cook + wiggle, all while my knees shake as I hope I have not angered the Apple overlord.
My Linux box is KDE, and, like with Gnome, I just ask politely while I set my own keyboard shortcut.
Itβs been a while since I used Gnome, but your screenshot makes it look cool π!