Nitrous is the best trip addition ever. A friend of mine got an erection one time when he was rolling and took a triple hit of nitrous. It was a funny topic of conversation for the duration of the trip. X_X
I've had some fun times with nitrous, too. One time I was candyflipping and I took a double... I lifted above my body and I was looking down on everything. It was insane. It was truely like one of those cartoons where they get high and start flying. X_X