Reelity on Instagram: "#onlyoriginals #theoriginals This Instagram reel shares a viral montage of physics experiments, from inverted glasses of milk and oil that don't spill to a bicycle with square wheels rolling smoothly, captioned simply as "amazing physics " to highlight their mind-bending nature. The non-spilling liquid trick demonstrates atmospheric pressure: when a card covers an inverted glass, external air pressure (about 10 tonnes per square metre) holds the liquid in place against gra