Plain single pun
One hinge, one mechanism, no structural trick. The default.
AcidWhat do you call an acid that's a jerk? Amino acid.WaterI tried emptying out water from a bottle as a joke. It was a pour attempt at humor.PilotI tried becoming a pilot, but that never got off the ground.SurgeonI got fired from being a surgeon. I couldn't cut it.TailorI tried working as a tailor, but I just wasn't suited for the job.Up hillI tried to go up hill but fell back down. The potential was there but it went down hill.The SunI'm always confused until someone sheds light on something. That's why without the sun, I'd be in the dark.GroundI used to be mad at the ground but I forgave them. It is all under me now.SwordsSwords were cutting edge when they were invented.SportsIt is striking the similarities between baseball and bowling.TreesWhat's the difference between a dogwood and a pine tree? The bark.SundialsSundials can only be used by male children. If female children used them they'd be called daughterdials.StutterWhy is it a bad thing for people with stutters to go to prison? They can never finish a sentence.UrineUrine is gender fluid.ZooI went to the zoo and saw an area with a bunch of loaves of bread in it. A sign above read "Bread in captivity."The MoonHave you seen the scenery on the moon? It's out of this world.TermiteA termite walks into a bar and asks "Is the bar tender here?"WaitersI hire waiters for all of my business meetings. They bring a lot to the table.WallThere is a joke about a tall wall, but you won't get it, it just goes over your head. I'm still trying to get over it.Pirated CornHow much do pirates pay for corn? A buck n ear.WandersWhy were the traveling wanderers always happy? They were nomads.Tree WhistlesI bought a whistle made out of a tree but had to return it. It wooden whistle!WhistleUsing a whistle blows.StoneI carved a guitar pick out of a boulder. It is used for rock music.