How did you realise you were dreaming?

[mylucidworld]

This thread is basically the opposite of Stupidest Ways You Missed Becoming Lucid. Instead of explaining how you missed becoming lucid you explain how you became lucid. How did you realise you were dreaming? What triggered your lucidity? Last night i was lying in my bed looking forward at my wall (this is a false awakening) when i realised my room is pink. I then went to move and i had that dream feeling and at that point i become lucid.