I could actually see a use for the Google Annotations Gallery in real code:

Stumble across code that somehow works beyond all reason? Life's short. Mark it with @Magic and move on:

@Magic
public static int negate(int n) {
  return new Byte((byte) 0xFF).hashCode()
      / (int) (short) '\uFFFF' * ~0
      * Character.digit ('0', 0) * n
      * (Integer.MAX_VALUE * 2 + 1)
      / (Byte.MIN_VALUE >> 7) * (~1 | 1);
}

This is a serious question. Could this be used in an actual code review?