I saw a vein of 12 diamonds Impossible. It HAD to be a double vein.
2 spider jockey together I have a hard time believing this, but it's possible.
lava falling that touches water falling in surface Your wording confuses me, but I have seen something similar to that.
jungle temple I have seen a few before.
two connected mineshafts Nice find, I have seen 2 connected mineshafts even WITH a dungeon in the center.
a sugar cane 6 blocks tall with another 5 blocks tall It generates on top of itself sometimes, but I hardly see that. Nice find.
a 4 blocks tall cactus It generates on top of itself, just like sugarcane.
a crazy wolf that killed 7 sheeps without stopping for a moment Happens.
a charged creeper Cool, I have only ever seen 2 charged creepers in my whole Minecraft life.
a lightning hitting a pig Never happened to be, but I suppose it turned into a zombie pigman?
a lightning hitting a block 4 blocks near me Meh, not rare. I got one 2 blocks away that caught me on fire for half a second. (BUGS)
sugar canes dropping because they were generated near iced water Really? I thought if it did that the sugar cane blocks despawned.
a floating birch Happened to me, nothing rare at all.
a hole in a desert with a dungeon in it Surface Dungeon, I bet. Was it square?
a giant underground cave I'm sure everyone has seen a reasonably large cave before....
an enderman teleporting into a wall They suffocate all the time. Creepy noises....
a creeper travelling with my minecart and something I don't remember... Happens with skeletons, pigs, zombies, and pretty much any mob.
oh and a village spawned very high and under the houses there was a tall cobblestone column. wow, finally I end! Seen it. Nice though.
Pretty much this, seeing charged creepers and jockeys.
I was using redstone back in beta 1.8, trying to blast a chasm with tnt. Enderman picks up block of tnt. Enderman puts tnt next to redstone torch.I am in the middle of the line of tnt, trapped. Everything explodes.
I also once found a triple dungeon, one on top of two that were connected
I once saw a jungle temple and a desert temple spawn beside each other in a jungle. Another time was an NPC village spawned on a natural lava pit. Yeah, and there was this time where I spawned on a pumpkin block. But perhaps the rarest was when I placed a pig on a high tower (I was experimenting if it will commit suicide) and then lightning struck it and it morphed into a zombie pigman and it dropped down from the tower and hit me on the head.
I think a charged creeper and an overworld pig man are some of the rarest things in the game right now.
Overworld pigmen? rare? Not exactly. I had two spawn within 24 hours of each other right outside my house.
(This was before they could walk through nether portals)Of course now they're always wandering through my nether portal and giving me free nuggets
I've seen 2 spider jockeys side by side I've seen countless pink sheep (I did not dye them) I've seen a tower ender crystal that the obsidian was in the ground only a block high. I've seen a 3 room stronghold. Yea I've seen a lot I also saw a 5 high natural cactus and 6 high natural sugar cane
I ended up finding an insanly large cave system just above bedrock. I ended up finding 3 diamonds, 20+ gold, and 8 Emeralds all in the same cave. Other than that I haven't seen anything paticularely rare such as a spider jockey or a charged creeper. I have seen a desert well though.
I've been playing sense the first version of alpha, but the thing's I've seen are 100+ Slimes 9 Spider Jockey's 20+ Pink Sheep About 3 double dungeon's A triple dungeon. 5 block high cacti 4 block tall sugar cane but the rarest thing I've ever seen is A zombie riding My pig that I put A saddle on :S -Last one was A glitch