NAM (98)

You're always on your feet, always hiking. Tripwires everywhere, guys getting torn up, legs blown off, castrated. You just gotta keep moving. You develop night vision. If you live long enough, you're able to spot the moonlight in the dew drops forming on the wire.

Once you learn to live like that, there's really no going back. It's hard to learn to walk again in normal situations. Even when you're back in the world, you go into a restaurant scanning the floor for traps. Taking these slow, careful steps. People think you're brain damaged.