Back Pack Strapping

When you sneek up on some unexpected person and mess up their back pack straps

Kid 1: Hey go tray that person!
Kid 2: Can't no trays!!!!!
1: Then do back pack strapping on him!!!!!!!!!!!
2: Ok! (sneeks up on other kid and pulls one strap REALLY long and the other really short)
1: nice job!
2: Thanks!
Other Kid: (Picks up back pack and puts it on) WHY IS ONE STRAP LONGER THEN THE OTHER!?!?!??! NOW I HAVE TO FIX THIS!!!!!!!!!