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I like the trippy feeling in the first 2 shots :)

True!! The effect of the hands trembling because of the cold, together with the backlight of the big street lights in front of me! :-)
And I really like the feeling that the people's back give to the pictures.

You are like me then :) I quite often photograph people from the back. Not only because I like it, but also because I don't want to get noticed.

Yes... Specially when they are doing strange things :-P