Job Hunting advice: what to do if you get an offer but you have another interview?

[texas*princess]

Here's a GC Hypothetical for all you career gurus out there:

Let's say t*p (that's me! hehehe) has an interview with Company #1 on Wednesday morning.

I went to the interview, I felt it went very well. The company is a great company... the job is a good one, the pay is giong to be pretty good. They also want to fill the position pretty quick.

This week I also have an interview with Company #2.

This interview is Friday afternoon. It's still a good company, you're not really sure about the position or pay, the location is really good.

........

ok.. In a GC Hypothetical world, what would I do if Company #1 calls on Thursday or even Friday morning and offers a job? SHould I take it? Should I try to stall so I can go to the other interview even if I'm not sure how quick they are looking to hire?

Of course all of this is a hypothetical.... I had Company #1's interview today... it's basically between me and another person, and it sounds like its' going to be a tough call for the hiring mgrs. A friend of mine works @ Company #1, so he kind of told me from what he heard (about them liking the interview w/ me but that it would be a "tough call")