Theatre related:
A lot, actually.
When Avenue Q won the Tony, I literally fell off my couch. I was really close to dozing off during the commerial right before, and as soon as they announced the winner I snapped back to my sense and literally fell off the couch.
When tickets that you've ordered come in the mail. I think TM Cara has referred to it as "the happy ticket feeling."
The start of an overture.
And... my ultimate, number one, head-in-the-clouds theatrical moment: hearing Adam Pascal sing Glory October 10th. I had no idea what was coming. The look on his face was pricless, the audience reaction was priceless... it was just something I never thought I'd see in person. The thought of it still gives me chills almost a month later.
A work of art is an invitation to love.