To activate Bat-Turn mode you need to hit the Batmobile spinner on the rotisserie. It doesnt matter its its a small hit that barely turns the or a big hit that spins it a lot. After you hit the spinner it wont register any additional hits for a few seconds.
Sine you need to hit the batmobile spinner to enable this mode its only available when you are in one of the villain modes since thats when the rotisserie has the batmobile spinner facing you.
Default number of hits to enable the Bat-Turn mode is 10 but you can change it in adjustments menu to be as low as 5. As you get closer to getting thee number of hits needed it will tell you on the LCD. For example, "3 more hits needed to enable Bat-Turn mode"
Once you hit it the required number of times you then need to hit the Atomic Pile shot to start the mode. The Atomic Pile shot is straight through the spinner and out the left side.
Once the Bat-Turn mode starts you have 40 seconds (time can be changed in adjustments menu). When you hit the batmobile spinner you are doing an "emergency bat turn". You'll see Batman hit the emergency turn lever, the bat chutes open, the batmobile does a 180, then the batmobile drops the chutes.
To pickup the chutes you need to hit a flashing white shot. The points to collect decrease the longer it takes to make a shot.
If you hit the batmobile spinner again then the timer resets back to 40 second, batmobile does another turn and drops another chute, and all the main shots re-light to pick up the chute.