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The Pulse Experiment

Cave Johnson here. We just finished perfecting the new Aperture Science Oscillating Pulse Drive - catchy, right? It allows stuff to switch on and off on an automatic timer.

Anyway, soon we're going to use this new technology to create a new type of strobe lighting for use in discos and nightclubs.

Thing is, we need you to test it. No, we're not asking you to go clubbing - that would be irresponsible and unsafe - you could tell people about our top secret experiments. Instead, we're doing something utterly responsible and safe: exposing you to copious amounts of concentrated radiation. For science.

Just make sure you don't get killed - because if you do - you're fired.

Cave Johnson, we're done here.