I like that idea
all we need then is a target that pops back up again after about 1 minute ..... Going back to my younger days, we used to have these toy frogs or bugs that you would press down, and after about ten seconds they'd spring into air (leaf spring thingy...). C'mon you boffins ... figure it out - this string principle is neanderthal
You need two things in life - WD40 & duct tape. If it moves and it shouldn't, use the duct tape. If it should and it don't, use the WD40.