Well. I was on the last level. I had just leveled up enough to get through the final gate. I hear a loud noise from downstairs, causing me to punch my keyboard out of shock. I pressed F5. Page refreshes. Progress lost. If that isn't rage I don't know what is.
It turns out I completed this badge in late October 2013. You have no idea how satisfying it is to get a free 15 points without having to use any effort.
I like how at some point in the game it becomes impossible to infect a country because they decide to close down all access to the place before anything can get to it. Surprisingly this wasn't Madagascar, but Indonesia.
Advice: The 2|4 upgrade for the Monkey Ace, Ground Zero, is one of the most useful upgrades in the game. It destroys every bloon and drastically reduces lag.
 "Rage 3"){kind=icon}
 "Give Up"){kind=icon}
 "The Visitor Returns"){kind=icon}
 "Knightmare Tower"){kind=icon}
 "Pandemic 2"){kind=icon}
 "Nuclear Plant"){kind=icon}
 "SCGMD4"){kind=icon}
 "Don't Shit Your Pants"){kind=icon}
 "A small talk at the back of beyond"){kind=icon}
 "10 More Bullets"){kind=icon}
 "Learn to Fly 2"){kind=icon}
 "Infectonator : World Dominator"){kind=icon}
 "Monty's Moon"){kind=icon}
 "Bloons TD 5"){kind=icon}
 "Burrito Bison Revenge"){kind=icon}
 "Sushi Cat The Honeymoon"){kind=icon}
 "Truck Loader 4"){kind=icon}
 "Papa's Pancakeria"){kind=icon}
 "Animal RaceWay"){kind=icon}