Ticket
The gladiator in front of you draws his sword. He points the sword at your chest and right when you think everything is about to end, you realize he's pointing the sword at the ticket in your hand.
Right! You needed to buy a ticket to see the gladiator! He doesn't want to kill you, he wants to check to make sure you bought a ticket.
けん
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The gladiator happily marks your ticket with his blade, when Ken (けん) the samurai pushes past you. He holds up his own sword, challenging the gladiator, who just shakes his head and points at your ticket again.
Ken takes a long time to examine your ticket. I don't think he understands that he needs a ticket to fight the gladiator. Maybe you should give him yours.