Mister Sunshine's moment has to be when The General cuts his ear off. Hardly sounds awesome, but his reaction to The General drawing a machete? He stands there and takes it, making only a single grunt as his best friend saws off his ear with the blade. It just cements the fact that this guy is nobody to mess with. It also leads to this strangely heartwarming, but still badass exchange between the two.
The General: I took no pleasure in this, my friend. But a price needed to be paid for failure.
Mr. Sunshine: Don't worry. I need only one ear to hear the whispers of the Loa.