On Space Probe an intamin freefall ride in a now defunct Australian park Wonderland, they had a room at the very top where the riders would face a TV screen. It would have a count down and would drop the cars at anytime; sometimes it would wait 30 seconds after the countdown, and sometimes it wouldn't even get to the first number.
On The Giant Drop at Dreamworld, Australia, another intamin drop ride (the tallest freefall in the world), there isn't anything; which I think is better, it doesn't have anything to distract you with; just the incredible 390 ft height and the wide open agrophobia-inducing space.