(after getting in trouble)
McGonagall: What do you all have to say for yourselves?
Remus: I'm aware of the issue and apologise.
Sirius: The way we acted was barking mad.
James: I'm dearly sorry.
Peter: We will be squeaky clean from now on.

pun
(after getting in trouble)
McGonagall: What do you all have to say for yourselves?
Remus: I'm aware of the issue and apologise.
Sirius: The way we acted was barking mad.
James: I'm dearly sorry.
Peter: We will be squeaky clean from now on.