You aren't sure you're dreaming. You almost know. But what if you're not? So you decide to test it... by trying to fly. You set your eyes on the sky and mentally will yourself to lift off. And somewhere between that thought and your feet leaving the ground, your realization becomes crystal clear. Yes! It is a dream after all! Flying isn't just a mode of transportation in lucid dreams. It's also one of the most popular ways to check if you're dreaming. But if you want to impr