aha, you workout in japan. there's been pages and pages of crazy shit that happens in gyms in japan. every crazy old man and woman in the community is there. and they're all doing something weird.
I had a highschool kid do "drop" sets on squats, going down 2lbs at a time. he was messing around with these little paper thin weight plates they only have in japan. he spent over hour, and took a couple of minutes in between sets. he started at 150lbs, and went all the way down to 50lbs. I was there for an hour, he was squating when I arrived, and was still doing it when i left.
in japan, the bench, curl, and lat pull down are most often done wrong. reason? it's the only thing 99% of Japanese guys do. they wear weight belts all the time, even when doing crunches(seriously). there's a few big rugby guys and bodybuilders, and a few arm wrestlers who know what they're doing. but physical education in japan is stuck in the 1950's. For a warm up, they bounce stretch. i don't think i've ever seen a japanese guy do a bench press with his back flat, always his hips are WAY up in the air. and often they wear spandex. imagine, if you will, a japanese man, straining to push the bar off his chest, his hips thrusting into the air, his pink and black spandex doing their best to contain what's within...
this one guy who only ever did bench and curls offered me a candy in the change room. i was just taking my pants off, when he reached out and said "candy?". i froze. it's still in the bottom of my gym bag, as a reminder...