In regards to their dress, there is smart and then there is smart casual. To me they kind of look like they are either going to church or to a job interview. Matt Le Blanc in his black shirt, no tie looks like I would expect for the occasion but the tie Schwimmer has on doesn't exactly say, "I'm here to enjoy myself". Maybe I am not used to US fashion. It just seems a little formal for a plane trip, even a private jet.
The reason I asked about Kudrows arm is that her shoulder looks like her upper-arm is positioned parallel to her body with her elbow at her hip. I have long orangutan arms but even I couldn't dangle my fingers over the edge of the seat with my elbow by my side. I always thought she was quite attractive and certainly don't think she has slenderman arms.