Portal

I would guess that taking photos on the London underground is against the bye-laws. However, I am glad you ignored this fact to capture this image. It amuses me. I am not sure if it is supposed to or not.

Thanks for your input. I did not know that this was against the local laws; I've been doing this for a while. No one has stopped me and neither have I seen any signs to the effect.

However, I'm interested to know what exactly amuses you about this photo. The situation presented itself in such a away that was hard to ignore. Beyond that, I had no other thought as I took the photo.

The thing that amuses me is that there really does seem to be a hole to another world. I am guessing it is an advert for a movie or something. The stance of the guy on the platform is similar )or similar enough) to the guy on the poster. I guess I am easily amused. 

I would not worry about taking photos on the London underground. I am sure hundreds of people do it. However, I do understand you need prior permission. (http://www.tfl.gov.uk/corporate/media/5225.aspx)

You are right. This is a poster from a forthcoming Star Trek film.

Thanks for providing the website link. I'll have a look. Till then, well..... :)