This is an awesome photo
this is really sweet, what a great photo! You should print it as a framed poster
wow, that's awesome, great shot.... (I feel sick!)
It gives me vertigo
M.C. Escher comes to mind...
Excellent idea and a cool effect/optique!
Really neat illusion!
That's a remarkable effect!
I got lost in a place like that in Paris, once.
My brain! Damn you! *explodes*