The legate Gaius Laelius was fearful that one of these men, Lucius Statorius, might be recognised since he had visited the camp before. To protect his agent's cover, Laelius caned him publicly. This episode plays upon the known Roman practice of subjecting only social inferiors to corporal punishment, and is of particular interest because it specifically identifies centurions and tribunes as active participants in espionage missions.
While the legates were in conference, the "slaves" were to wander about the camp in different directions and reconnoiter the premises, taking note of entrances, exits and the location of each division."
- Intelligence Activities in Ancient Rome : Trust in the Gods, but Verify by Rose Mary Sheldon.
Clearly concerned that the Romans were pulling ahead in the field of melodrama, Hannibal responded by inventing Snakes on a Ship. Which is where you fill a lot of pots with venomous snakes and fling them at your enemies' ships, hoping that their barefooted sailors will all jump into the sea in horror.