The 'good' thing about the 'Bus is that the door disarms if opened from outside. Also we've discovered that if the cabin crew do blow a slide with the steps / bridge outside, then the slide will flop onto the platform but shouldn't inflate - it requires the weight of the slide falling to set off the gas. Still not a good thing mind you and I wouldn't want to be the gate staff seeing that big yellow chute unravelling in my direction.
Any photo of the US mod appreciated as we may like to use it here and have been discussing various SOP options for a few months now to prevent these.