Pranks In view of the large number of recent postings of college practical jokes, I'll 'fess up that some friends and I were the instigators of many a prank while undergraduates in college. The following are some of the better pranks: 1) It somehow came to our attention that most of the campus street and walkway lighting came on *simultaneously* each night, the actual time being based upon the actual level of ambient light. It was obvious that there was a central control point with a photoelectric sensor somewhere. After a few exploratory tours of the campus, we came upon a likely location: two photoelectric controls mounted on the roof of a service building directly across from the campus electrical substation. After "borrowing" an extension ladder from a telephone company truck (which was always left parked near a service building), one Friday night about 10:00 PM (peak campus traffic time) we climbed on the roof of the service building and taped flashlights to each of the two photoelectric sensors. Instant blackness! Actually, the most amazing part was that it took OVER ONE HOUR for the campus maintenance people to restore the lights! I would have thought there to be some kind of manual override for the photoelectric cells, but perhaps the maintenance people thought there was some kind of underground cable fault so they didn't rashly restore power. 2) The father of my dorm roommate worked as a repairman for the Otis Elevator Company. One weekend, I stayed with my roommate at his parent's home. While talking with his father, we learned an *amazing* fact: almost all escalators are reversible for use in breakdowns or emergencies; there is usually a key operated reversing switch located under the handrail at each end of the escalator. We also learned a second *amazing* fact: most all Otis elevators and escalators use the *same* key. While my roommate's father went out for the evening, we swiped his work keys, and were able to get many of them duplicated. As soon as we returned to campus on Sunday evening, we went in search of an Otis Elevator (we didn't have to go far - our dorm had one). Sure enough, we had The Key. Over the next few days, we found that The Key worked on every Otis Elevator that we tried on campus. We were now ready for an escalator (there were none on campus), and we readily found one in a five floor department store in the heart of the downtown shopping district. It was an Otis, and sure 'nuff it had a reversing switch at each end beneath the handrail. We came back on Wednesday night, which was the peak shopping night of the week. There were two pairs of escalators - one at each end of the store. After nervously waiting for the right moment when no one was on the UP escalator, and no one was looking, my roommate inserted The Key, and turned it. Grrr-klunk-grrr. The UP escalator came to a halt, and reversed direction - it was now going DOWN! We quickly went to the other escalator pair, and I got the honor of inserting the key. We now had an increasingly crowded department store with four escalators on the main floor, all going down! We tried to act inconspicuous as possible (not easy with half dozen 18-19 year-olds sporadically going into fits of hysterical laughter!) and watch the action. People would step on the UP escalator without looking at direction, and then step back in shock. Then shock would change to disbelief: an UP escalator going DOWN - impossible! People in the store were forming an oval as they traveled from the front escalators to the rear and back, trying to figure out how to get to the second floor. After about ten minutes of this, with the main floor crowd growing larger, a *very* agitated person wearing a suit (must have been the manager) came by with a big ring of keys, frantically trying each key in the escalator until he found the right one to operate the key switch. Since the manager was eying us suspiciously, we didn't stick around to find out any more about the situation. ***** All this talk about practical jokes reminds me of one I heard about in high school. It seems that a psychology class decided to give their new found knowledge of the "power of suggestion" a little test. Some of the students had another class together and decided to play a little trick on their teacher. Whenever the teacher was on the left side of the room, they would act really interested and when he was on the right side of the room, they would act really bored. Well, it seems that this behavior did its job on the teacher's subconscious and he was practically crawling on the left wall by the end of class.