it requires that you start "hand in pocket', with enlarged "mouth" on your front pants pocket and a velcroed-in kydex holster. It also requires that you sidestep AS you draw. This side step adds at LEAST .20 second to the time he needs to shoot you. He also needs at LEAST .20 second to RECOGNIZE what you're doing as being a threat and .20 second more to reverse the "dont shoot" signal that he's currently sending to his gun-hand. So he needs at least .60 second. You can learn to REACT…

you CAN 'beat the drop" from concealment, if you know how.