Leonardo has succeeded in producing the effect of the coup de theatre at the moment when Jesus said "One of you shall betray me." Instantly the various apostles realise that there is a traitor among their number, and show by their different gestures their different passions, and reveal their different temperaments. On the left of Christ is St. John who is overcome with grief and is interrogated by the impetuous Peter, near whom is seated Judas Iscariot who, while affecting the calm of innocence, is quite unable to conceal his inner feelings; he instinctively clasps the money-bag and in so doing upsets the salt-cellar.