Which Family Matters episode did this dialogue occur?

There is this one scene from Family Matters that is just haunting me forever. I have no idea what season it's from or what the title of the episode is.
Okay, here's the scene:

Carl, I believe his name was, and Urkel were trapped in a tiny room or vault or something with some white guy and they're trying to get out. Then they exchanged dialogue somewhat like the following (I'm just going by memory here...):

Carl: Okay, let's pull together to open this! I'll say 'ready get set go' and then we open the door, okay?
Other Guy: Wait! Do we open on go or after go?
Carl: Um...
Other Guy: Okay, how about you say 'ready get set go OPEN'
Carl: Alright... ready... get set...
Other Guy: Wait! Do we go on open or after open.
Urkel: I know! How about you say 'ready get set go open.. and NOW'.
Carl: WOULD YOU STOP THAT!!!

The dialogue may be switched around a bit but it's something like that. Does anyone know the name of this episode?

You have to be a REAL Family Matters fan to memorize the lines like that.
But your description of the scenario helps. I skimmed through the episode guides and came across one episode that matches your description. There is one episode where Mr. Looney (the janitor), Carl and Steve were accidentally locked in the school's fallout shelter.
The shelter is probably the vault that you're talking about and the white guy you're referring to must be Mr. Looney. Everything fits! Family Matters is on ABCFamily. So check your local listings using this website (zap2it.com) and the next time the episode "Looney Bin" (Season 6) comes on, watch it and see if it's the episode you're looking for.
Good Luck!

Are you serious if anyone can answer this right they need a life who would remember that?

If any one can guess this, I'm scared for them...

I don't know but it sounds like the writers stole it from Lethal Weapon 2...when Danny was sitting on the toilet and looked over at the toilet paper which said something about a bomb.

Danny and Mel's characters were saying ok we go on 1-2-3 but the couldn't decide whether they jumped when the said 3 or right after they said 3.