How would one night of smoking affect my progress?

[jeffman]

So far I've been clean 49 days on Saturday, March 15th. I've been really stressed lately and would like one solid night of smoking.
And also how would this affect a hair test? I am applying for an internship in the aerospace industry (Lockheed Martin, NASA, Boeing, etc) and am almost positive they will test me. Like I said, I have been clean nearly 50 days, but I've heard that you can smoke a couple times without it showing up. Could someone elaborate on this?
Edit: I've been REALLY stressed with school and whatnot and I would like to relax for one night.

If Your interested in a old past aerospace worker's opinion,
It's not worth one buzz. Your doing great and that half day buzz will put far more stress in Your immediate future then it's worth.:smokin::stoned: