I would just the gunslinger do exactly what you said, but do it with a finger gun. Have the Blade Dancer spin the knife in the air and catch it. Maybe then pose with it? Have lighting run down the blade while he messes with it. Have the Night Stalker use an air bow/imaginary bow instead of the actual void bow and just fake shoot a few arrows? I dunno, but I love the concept! I wish they would implement it so badly!