I want to say
that to do it a Better Way, a Different Way,
I need to go out not to play.
To do a Different Way this day
I need to stay cool,
that way, there will not be sorrow.
I want to do it a Different Way this day.
L thinks Mister actually intended humor. When he said "stay cool" he was talking about staying cool in the air conditioning and this helping him keep a "cool head" or "cool attitude".