I wish I could put you in a cage with a million mice an' let you have fun.
Put Him 'Out of His Misery'
He ain't no to good to you, Candy. He ain't no good to himself. Whyn't you shoot him Candy?
S'pose George don't come back no more. What'll you do then?
George goes off on Lennie and tells Lennie how much better his life would be if Lennie wasn't in it. George is the only person who Lennie can trust and be comfortable with; so it was very cruel of George to say such harsh things to Lennie.
Remembering One's Place in Society
I could get you strung up on a tree so easily it ain't even funny.
Carlson is pressuring Candy to kill his lifelong companion, his dog. He won't take no for an answer, and in the end kills Candy's companion, which is very cruel.
Being Owned By a Man
I get lonely. You can talk to people, but I can't talk to nobody but Curley. Else he gets mad.
Crook finally has more power than someone, so he tortures Lennie to gain more control and exert power. He puts Lennie through emotional torture; and he is very cruel.
I done something bad!!!!!!!!!
Crooks was finally getting cocky and exerting his power, but Curley's Wife's cruel words remind him of his place in society as a black ranch man.
Curley's Wife isn't even treated like a person; she is just treated as Curley's property, because he owns her and cruelly takes total control over her.
Lennie doesn't even realize what he is doing as he cruelly breaks the neck of Curley's wife.