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I believe all of these have been bugged since they were added, each one seems to more or less break the game in a different way. These can include, but not limited to, turning the player into a permanent ragdoll, taking control of the camera away from the player and placing it near the center of the map, and temporarily freezing the game.
All of these glitches only happen if the action is used more than once, and/or the variable is also modified before doing so. In short, they are basically unusable, and the only way that they can be used can also be done by other actions which do the same thing in an easier fashion.