Eventually, you're no longer being swung back and forth in Mary Lynn's fist, as she stops walking. She lifts you up and releases you on a hard grey metal surface. You realize almost immediately that the gun is sitting directly to your right. It's several times larger than you are. You pause for a moment, wondering what you can do with it. Could you even fire the gun if you tried?
Mary Lynn is staring at you with a self-satisfied grin on her face. You wonder if there's a chance you could run over to the giant gun and try to fire it. It's still on shrink, right? If you shrunk Mary Lynn on the ground, you'd have as much time as you needed to enlarge yourself.
You break for your right and run towards the trigger, hoping you'll figure something out.