It's a program that displays a badly made ASCII-art animation to punish you for your typing error - and after that magically launches the command you meant to launch. The code is available under an MIT-like license on github - though of course anybody can write his or her own version in a couple of minutes. This whole thing is heavily inspired by sl, which displays a steam locomotive. However, gti is actually nicer than sl as it at least executes git after the animation. :-) WWW: http://r-wos.org/hacks/gti