You might see something on TV with the Bridge Cam and want to run out and grab a photo quick.
If you are in an aft cabin or close to the aft elevators and you want to run up on deck to get a picture or something take the aft elevators to deck 11. When the doors of the elevator open you will notice to the right that it is the entrance to the kids area. Initially you think you can’t get out on deck from here, but if you will go to the left through the arcade all the way to the back on the right is a door that opens and presto you are out on deck. Observe where it is for a quick return trip.
You really don’t want to get out on deck 10 since you are in the buffet area and especially if it is open many people jamming, and you have to walk some to get on deck.