A : *trow rubbish*.
b : Hey man, sorry you can't trow the rubbish in here.
a : why? you don't like it ha?.
b : sorry, i just told you about the rule.
c : Hey what's going on?.
a : Here, this guy. Said that i can't trow rubbish in here.
c : Sorry man, i think he right. please, c'mon. we must save our environment..
a : nevermind!