All-new geek quotes, modified to celebrate the new forum - (Jan/26/2009 )
Ishka: Sounds like a true Ferengi to me.
Star Trek: DSN
and for you I'll keep ready a fire extinguisher... 
Chopstick Joe: Whoa, whoa, whoa! Don't blow your flaps. There are times when a man has no choice. Sometimes urgency requires expediency.
Macao Gold
ppfftt...what type do you have and I don't think you even know how to use one.... 
...
Captain McCall: Sir, I must insist - in this case urgency overrides security.
The Battle of the River Plate
anyway with or without intention (or need) I'll hit your head with the foam 
Lionel Hutz: Very well, but first some ground rules. Number one, we get bathroom breaks every half hour.
The Simpsons
and I'm betting you can't even lift it with both hands......
Frasier: Oh? Shall I refresh your memory? Midway through the opera her ermine muff began to tremble. As it turned out she had used it to smuggle in her adorably incontinent Chihuahua.
Frasier
well the left hand is enough... 
Earl Sinclair: Alright, that's it! We're going back up to the bathroom and we're not coming out until one of us is potty trained!
Dinosaurs
ppfftt...you forgot the first rule of using an extinguisher...you need both hands ie, one to hold it while the other aims the nozzle....unless you'd pick it up with your teeth...but ooops, I forgot..you don't have any.......
Dean Winchester: HEY! Why don't you control your OCD?
Supernatural
sounds experienced, I wonder how many university floors you foamed just for fun...
anyway there are types you can use one-handed...
Detective Andy Bellefleur: I know what I'm doing. I got it under control.
True Blood
you wouldn't wanna know... and this one-handed type.....hmmm...are you sure it's a fire extinguisher and not a fireman's hose? You'd need both hands and your two feet too to control one of those........
Dr. Gregory House: Because you're a control seeking narcissist. Which is fine, good even in some jobs.
House MD
sure, but I'm better equipped than the Canadian fire brigade apparently, because I've a bike which you can ride using only one hand too... . Anyway I meant the small ones e.g. in cars for single-hand use...
Michael: I love my ears. I love my nose. I love myself.
Longtime Companion
sounds experienced too...how many cars have you foamed just for fun? and how many bikes? ..