April Fool's joke for Minamino and his teammates would be simple but also require a large coordinated effort from everybody. We all know how much Harrington loves to spend time working on his hair, growing it out but rarely getting it cut. What we've done is collected a bunch of locks either from having the same hair dresser and getting them involved or similar looking hair from elsewhere. Day of, we'll drop a few of them by his feet and in the shower inconspicuously wondering who's been shedding so much hair. Before practice, we'll try to stuff some into his helmet before he puts it on. This stuff will probably have some very weak adhesive that would melt in a bit of head. With his lid on, the fake hair will become unstuck and ready to fall off. Combine that with getting the local rink guys to cover up all the nearby mirrors and hiding Harrington's phone, everybody will just act surprised about how patchy his head has become as he runs in order to find some way to check how it's looking.