Subtly different from regular, or garden, science, SCIENCE! is when reality starts to break down in a haze of maniacal cackling. Any idiot can practise science. It takes a real psychotic genius to pull off SCIENCE! The capital letters and exclamation mark are important.
Newtons laws of motion are science. Frankenstein's monster was SCIENCE!
Performing SCIENCE! occasionally leads to angry mobs attacking your isolated castle, wielding pitchforks and burning torches.
"B-but that's impossible! It shouldn't work! It can't work! It doesn't make sense!
"Nothing is impossible for SCIENCE!"
It works, bitches.
SCIENCE! can be: I(f) = ((2hf^3)/(c^2))(1/(((hf)/(e^kT))-1))
The event in which, while gaming, something unexpected happens and you need to explain why.
Alternatively it is used to explain why you are doing something difficult or boring but provides rewards on completion.
Finally it can be used as a good old exclamation in everyday life.
*Character is floating in mid-air*
Observer: What!? How is that possible!?
Observer: Why are you going all the way over there for a sword?!
Gamer: because SCIENCE!