It’s that time of the year again. Time to warn you that going to the bathroom at half time during the Super Bowl could be dangerous to the health of your plumbing — and your city’s waste system. It’s called the “Halftime Flush” and, according to legend, some 100 million of us will be flushing during the Super Bowl halftime show — and it means big problems for our pipes. Only the story isn’t really true. While millions will take a break and head for the bathroom at halftime, not all of us will be doing our business at the exact same time.