Did my first reality check in dream!

Last night was the first time my brain did something related to lucidity. I was biking with my friend on a bridge and for some reason, decided to go off the edge. Whilst falling I thought "Could this be a dream?" and stuck my finger through my hand. I don't remember what happens after that. I didn't even realize this until a few hours after I woke up. Even though I didn't achieve lucidity, it still made me very excited.