Soooo…how was that an AIRTIGHT bottle :wassat:???
Well, my point is, Luffy would probably become like Mr. Fantastic, not as in copy him but be like him.
Quote Wikipedia:
cannot be harmed by bullets or other projectile weapons, including knives, missiles, darts, etc,
I think Luffy could manipulate and concentrate his power so even knives won't hurt him. Knives and stuff become blunt if you shrink yourself to their size. A needle can look like the Washington Monument, not sharp at all. If you're a giant, it'll be extrmeley sharp.
extend spikes from his body.
Again, from Wikipedia.
I have an idea that goes along the lines of this:
Luffy gets hit by a projectile.
The projectile keeps going forward and pulls on a part of Luffy. Think Morgan's marines and their rifles vs. Luffy.
Luffy flings his arms back and grabs hold of the projectile.
He then extends his arms even further, still holding onto the projectile.
He lets go and the thing flies forward with more force than the original launch of the projectile.
I imagine Luffy decimating walls with a single bullet this way. I know it doesn't make sense but it's a freaking shonen.
Usopp pairing up with Luffy, with Usopp unloading his ammo into Luffy and using him as a giant slingshot would be awesome.