In my Health class, my teacher makes all the students line up shoulder to shoulder between two lines of blue tape that are just wide enough to keep our bodies in between them. She wants us to reverse the order we're standing in (all the kids on the right side will be on the left side and vice-versa) without us stepping on or outside of the blue lines. Sounds kiddish, but it's starting to frustrate me. How do you do it? She says there's a really simple solution, although we've been trying to get one kid from one end move to the other end and that involves pushing and shoving and stepping outside of the blue lines. Please help