The first picture is just a Hovering brick with Onactivate>self>fire relay Onrelay>Self>fire relay Onrelay>self>spawn projectile> 0 0 0 Gun bullet 100 100 100.
(or at least i beleave that is...) The second one is a forget up with console+Medigun+Robloxian datablock, and the third one is just some random guy, Mission editor changes, and the Confusion emote.