>In Build 2513, In Worldcraft 3.40 (prior to it being renamed to Hammer), or if you have a leaked Half-Life 2 build from 2003, when you run Hammer for the first time, a midi of "U can't touch this" will begin to play and at the bottom left of the screen where it says "For Help, press F1", instead shows the following strings "You can't touch this", "Stop, Hammer time!" and "Hammer time!". 3 of those strings are randomly selected to replace "For Help, press F1" at the bottom left. This lasts for about 3-4 seconds before returning to normal. This easter egg once activated, it will no longer activate again, unless the user goes to the Registry Editor from Windows (regedit), and deletes the registry "Hammer time". This easter egg does not exist anymore on modern versions of the Hammer editor due to the fact that quickly checking HL2 editor and the GMod editor via a hex editor showed that "Hammer time!" was no longer in the program.