My list:
Ultimate Fails in Clash Royale by MagnetsCarleson
1. Internet Goes Down
2. You miss your Rocket.
3. Going aggresive too early and getting clapped by a counter attack.
4. Your opponent pretends to be AFK, so you go Really Aggresive and get clapped..
5. Play someone with everything maxed.
6. Play someone with your troll deck.
7. You win a tower, but he makes an epic comeback.
8. Your mom tells you to get off your phone.
9. Someone steals your phone.
10. Miss your Inferno Tower by 1 tile and the Pekka doesn't go for it.
11. Gets Graveyard frozen with you having 0 elixer to defend.
12. meow
1. Internet goes down
2. Put your troop or spell or building in the wrong place
3. 1 HP!!!!!!
4. Immediately going aggressive and opponent stops your army
5. Accidentally using your only level 9 deck
6. Your opponent went AFK but ends up getting a clutch on you.
7. When your opponent freezes you...
8. Paired up with overleveled people. Example: A person with only level 11 cards and the other guy with all star leveled
9. Trophy dropper trolls....
10. Internet prevented an awesome rocket play
Etc...