Tighten and loosen a nut

Thread a nut onto a bolt and tighten it, then take it off again. One round per clip.

Start: A bolt and a loose nut on a table.

Record: Start the nut on the thread and turn it until it is tight, then let go for a second. Undo it, take it off and put both down.

Done when: The nut is off the bolt and both are on the table.

Also counts: Any nut and bolt size; by hand, with a wrench or pliers; wing nuts; a bolt held in the hand or fixed in a part. Send as many clips as you like, changing the nut and bolt or the tool each time.

How: phone on your head (not on your chest or in your hand), both hands free and in view the whole time, good light. One continuous clip of one complete round, about 10-60 sec (max 90 sec). Start recording a few seconds before you begin and stop a few seconds after you finish. Keep the app open until it uploads. Keep faces and documents out of view.

Can be declined if: not first-person, phone held in a hand, hands out of view, the start or the result not visible, the round not finished, or too dark or blurry.