Quoted from Medisinyl:Pressing both flippers allows you to fight the prison zombie there and control the magnet (similar to Battling the Power on TZ)...properly timed flips can get one or two hits on the zombie with the magnet and stop a SDTM throw...sit idle, and the zombie can attack you with the SDTM attempt.
It's a good feature IMO, not a flaw.
Put me down on the list of people who didn’t know this either.
Sounds awesome though and I’m gonna try it first chance I get.