Indrajit: Means "conqueror of Indra" from the name of the god Indra combined with Sanskrit जिति (jiti) meaning "victory, conquering". In Hindu legend this is another name of Meghanada, the son of Ravana, the king of Sri Lanka. He was given this name by Brahma after he defeated Indra.
You pretend that you don't see Indrajit, who is trying to surprise you from behind. It's hard to remain serious and you end up laughing as they pounce, ruining their plan.
Indrajit suddenly pops up beside you with a woof of excitement. Jeez! There goes your relaxed mood.