A legal battle does not permit of surprises. A legal battle is very much like a boxing match or a tennis match where the opponent is known and the instruments of battle i.e., boxing gloves or tennis racquets and ball, as the case may be, are in plain view for all to see. No surprises are intended. In a Military battle however, surprise is fair game. The: enemy is not to know his opponents weapons or battle strategy. The enemy can surreptitiously plant bombs, land mines, etc. An ambush is a legitimate battle strategy. What the Appellant did by relying on the Chinese regulation without first pleading it, is a veritable ambush and a Court cannot rely on such evidence.
– O. Daniel-Kalio, JCA. Egypt v. Abdoulaye (2017) – CA/K/540/2014