I was working on the final build and instructions for my papercraft Ganondorf when I decided to take a break and play a little Advance Wars.
In Advance Wars, when a Sub dives or a Stealth cloaks, it basically becomes invulnerable to most units, except for its natural enemies (other Subs or Cruisers or other (Stealth) Fighters).
I can imagine those little soldiers going: "whaddya mean I can't attack it?? It's right there!!" ;o)