Architecture 'tour'...1973....we were in Bath [England]....bus trip from London....about 10 of us had hired bikes to get around as well....we stopped for lunch, chaining all 10 hire bikes [daisy chained] together...leaning them up against a bridge railing.
Coming back early, 3 or 4 of us picked all 10 up....and moved them down the road, and on the other side...and lay in wait to see the others' reactions.
Most just stared at the empty railing.....blankly....saying 'WTF'?