I don't remember where I first heard this gag, but it's a good one. I've been to enough job interviews to know that you don't want to end up sounding like this guy. Leaning your arm on the interviewer's desk probably isn't a good idea either.
I think my favorite part of this cartoon isn't the punchline; rather, it's the characters' facial expressions. The roles of straightman and comic are clearly identified. The interviewer's look of intense probing is perfectly matched by the interviewee's look of absolute smug confidence.