What is stopping you from picking up the rock after throwing it? Let me tell you, I still have a little pebble I found by a river some 20 years ago and it's not even a particularly cool looking rock or anything. If I had a perfect rock you better bet I'd keep it forever.
It's an interesting choice of words considering the Union Jack alone covers 10 times more ground than the Brazilian flag did and the only part of it you can even argue was attacked were the incomplete blue fields under it. It might have been a timezone problem since I went to sleep and the whole piece was gone... But I can only speak for myself and honestly I had no clue that it was supposed to be a giant Aussie flag.
Somehow this is the first time I've realized the symbols don't match their names at all. Not really sure what's dirty about them but it's actually pretty handy to have all suits be called the same names in French and Spanish suits since both are widely used around here in Southern Brazil.
Oh, there are so many songs I could choose. Most hits from Brazil aren't well known outside. This one is a certified classic, though: https://www.youtube.com/watch?v=cOchidcyv9Q
Interesting. I never finished The Witness but I got some solid 10h of entertainment out of it before I stopped having fun. I'd say it is a brilliantly well designed game that's well worth the price if you are into puzzles.
They're talking about Dungeons & Dragons, it's kind of a tabletop game where one player (the Dungeon Master, or DM) basically creates adventures for the other players. It's very nerdy but very fun and also takes a lot of time.
No worries, the rock won't go anywhere. It'll remain where you left it, patiently waiting for you to become scuba certified, like the good rock it is.