When The Exorcist was originally released, the Spider-Walk scene was cut from the film, not because it was considered too graphic, or sick, but simply because at the time they couldn't hide the wires they had to attach to Linda Blair in order to achieve the proper effect.
Now, more than three decades later, with releases on VHS and DVD, film editing techniques have sufficiently advanced to the point where the wires used are no longer visible. Now we have the current, just released version of The Exorcist on Blue Ray.
I don't know though, something still doesn't seem quite right.