To get into the Tower in revolution the characters had to scan their hand into some biometric security device. I made the screens to specifications and had them playback live on two iPads which were fit into a special effects device. Both screens had to trigger when the actor laid his/her hands on the device so it was controlled from off-screen via a wireless keyboard in Bluetooth mode. When the actor touched the right screen the animation played automatically and the left screen was triggered manually to match the action on the right.
Here’s a video of what the animation looked like in real time: