Nydus Exit Bug
This is the original source!

Category/Ratings:
Severeness factor: 4/5
Race: Zerg

Requirements:
A nydus canal(no exit), a done or hatchery or mutalisk or hydralisk.

Instructions:
This glitch will make a drone become the nydus canal exit. Tell your nydus canal to build an exit. Then, take any unit and morph it into a unit or building(doesn't matter, anything with a cancel button will do). Now do the Selection Glitch so that the unit with the cancel button is selected, but the nydus canal exit(which is morphing) is controlled. Press the cancel button and it should cancel the nydus exit, giving you a drone. This drone is the new exit. You can morph the drone into any building and it will be the exit(note that you can't send units through while it's morphing). You can also get the drone to enter an overlord, and wherever the drone entered, the units will exit in that empty area.

WARNING: When the drone is killed, the nydus entrance will not die. If new units are made, those units will become the new exit, and killing the entrance will kill whatever unit was built afterwords. HOWEVER, if NO new units are made, and any other units killed, entering the nydus canal will crash the game.

Anti-Glitch:
OBJECTIVES: Destroy the nydus entrance.

Screenshots:
Currently none.