(warning; aside story following) 
Right before I went away to college, I went to a church stret fair.  At the carnival, there was a ride called the Kamikazee (dual looping starships, like the areo 360 @ kennywood, but enclosed in plexiglass not inverted).  Anyway, I was flirting with this girl in the other ship and we exchanged names via the ride op.  He gave us a really long ride.  After locking us upside down for 20+ seconds, we proceeded to go through 30+plus loops (after that I stopped counting).  I ended up getting another ride just like that later in the nite.  those were my most flips. 
jeremy