Breaking world records and achieving personal "bests" are all part of the Olympics.
Here are four surprising things athletes and fans can't do at the games.
- You can't share an internet connection.
The use of personal hotspots inside any venue is a great big no-no.
- You can't play bagpipes.
It's true. Any noise-making device including whistles, drums, rattles, bagpipes or those irritating vuvuzelas are banned from the venues.
- You can't pay for anything using Mastercard.
Since Visa is an official sponsor, your Mastercard won't work at the games.
- Unless you're buying "fish and chips," you can't buy French fries from anyone other than another official sponsor, McDonalds.