• A slight over-reaction, perhaps.
Two guys at a science park pranked a colleague on April 1st by moving his car. When the guy couldn't find his car, the science-park security force naturally thought it must be a terrorist threat and evacuated the entire building. [
Chester Evening Leader
]. Update: Here's a link
that should work. Plus, this article (unlike the first one I linked to) makes clear that what actually happened is that the guys moved the car into a restricted parking lot, meant only for nuclear engineers, which is why the security got nervous.
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