Overkill: Use an Old Pacemaker To Control Delay In A Drop Shot
I've seen some crazy setups for high speed photography utilizing all sorts of weird parts. There is even a system that will turn the lights off for you, if you so please. But, this is the first time I am seeing such a huge overkill in term of components used to gain some control over the circuit.
David Prutchi from Implantable Device has plenty of old pacemakers that cannot be no longer be used for their original purpose. He used one of those to substitute a delay circuit in a high speed photography setup. The delay can then be controlled by adjusting the atrioventricular node delay on the device.
You can read more about this crazy setup on implantable device.