GTA V shared knowledge

[Qub1]

I was wondering what all the facts about GTA V were, and I though it would be a good idea to start a thread where people can share their knowledge about GTA V.

So, here's what I know so far:
- Sharks
- Diving
- Submarines
- Airplanes
- Trains
- Switching between characters
- Animals

Does anyone else know some extra stuff that is interesting?