In 97 I was studying in the 2nd year of electrical engineering high school. Every year we had to spend one week in internship at some company. I was with 2 other classmates in some company that did ISDN networks. On the very first morning boss brought notebook with 10 minute PowerPoint presentation on ISDN, told us to watch it and left. We watched it in 10 minutes and waited. He returned 8 hours later and asked us what have we learned. The notebook screen was black so he pressed the spacebar, screensaver went on (pipes from windows 95). He giggled and asked: did you change the screensaver? Get the fuck out of here! And they never let us into the building. We spent rest of the week slacking off in the town.