Jim Carrey's explosion in popularity in 1994 is still one of the most incredible things to me. Carrey went from being on a cult hit sketch show to the biggest comedy star on the planet in just one year. Most actors have to go through years and years of work in order to become superstars, but Carrey did it after just three consecutive movies. I honestly can't think of any other actor that comes close to that popularity explosion.
Also, a Nicolas Cage-Gary Oldman Dumb and Dumber needs to happen. Why didn't we get a badass remake like that instead of that stupid prequel?