when i was back in high school there were some tunnels that started off of school property and went under the school parking lot as a drainage ditch, the tunnel is barley big enough to crawl through and then it widens out, me n my friend skipped class and went down there to puff down and we finished two joints before we heard sirens and saw cop cars speeding through the parking lot threw a hole for drainage, we wwere freaking out cause we thot they were three for us and we called up a friend who came and picked us up from the tunnel exit, it was a fire drill and we felt stupid as shit