RTS Labs Front End Developer interview questions

I was invited for a face to face interview after an initial phone screening. When I went to interview, I was taken to a conference room for a demonstrative technical interview. I was met by 2 developers for the process. Some of the questions involved me writing code to demonstrate my knowledge. On the second demonstration I provided, I heard a snarky comment from one of the developers who apparently looked like he was having a rough day. As I was coding something for him and the other interviewer, he said "dont' worry about that, we don't want to be here all day." This was completely out of line even if he didn't mean it in a negative context. I didn't appreciate that. Secondly, I overheard him curse several times in the interview as he was speaking. This by far, was a negative experience and I hope that this does not happen to someone else. If I could go back, I would have spoken up and showed my dis-appreciation to him, but I was caught off guard. I would not consider this company again.