Juror Eight wants to reenact the old man's walk from his bedroom to the front door because he believes that

the old man could not have reached the door as fast as he said he did.

the old man is covering up for someone else.

Juror Three knows who really committed the murder.

the murderer actually escaped down the fire escape.

he has become more humble and patient in battle.

the examples that saki used to represent satire through situational irony are options two (2) and five (5) inasmuch as the wolf thought that looking for a girl in the bushes could be as easy as hunting little pigs at the park, but it took him so much time to find the girl if it had not been not for a silly mistake. also, bertha would have survived to the wolf's hunt if she had not won those medals for goodness, which at the end they were what got her killed by making noise, so winning medals of goodness was not so good achievement, after all.