Last time I "went vertical" I was on a kiddies' swing next to my little daughter.
I stopped it after about 5 secs. 
I don't ever want to go vertical again.
It all depends on the equipment used 


(on a beautiful day over Florida with Lee and Crazy Horse, the day after the AW Con. 
I had been up for 3 days straight yet I was very much up for this flight 

-GE