Task: Categorize the tweet's emotional expression, classifying it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that reflect the tweeter's state of mind.
Tweet: 3:45am and off to the hospital! Elouise's waters have gone!  #Labour #LittleSister #superexcited
This tweet contains emotions: 
joy