I remember someone made a nerf gun (yes,made) that functions similar to a lever action rifle,you loaded in nerf darts in similar to a regular lever action,but the whole handle (and stock if one was attached,it accepted most rifle stocks) whilet he front when down,A.K.A. you fire you simply pulled trigger,and release a latch with your thumb,and flicked the bottom down,and back up and it latched back with a new round...wonderfully good nerf gun at that
never seen the ratchetblast one...odd looking it is...
oh,and another odd one I saw was a special RPGish pump action coke/beer can shooter.You pumped in a new can after every shot,but since it was black powder,to help make it more semi-automatic,when you pumped in a new round (you couldn't hold the mechanism forward either) you released a set amound of powder from a can onto the gun into a small chamber for fireing it.Awesome gun it was.Only held 'bout 4 cans in a 2 foot long pipe with enough powder to fire 10 shots (It was a decent size can).You could always load in more rounds,but the only way to hold,let alone fire it,was to set up a tripod...it was hell trying to pump in a new round.