This would make a great starter or plenary for a geography lesson looking at human interactions, urban landscapes and cityscapes.
‘Bodies in urban spaces’ is performance art from chorographer Willi Dorner. I managed to catch his show in London this weekend and took a few photos which you are welcome to use in your class as a slideshow to generate discussion. I think students will like the humour in some of the photos! Please do leave me a comment on the photo album if you use the slideshow - I'd be interested to hear your students' reaction to it.
Alternatively, there are the following (and more professionally taken photos) slideshows/videos on these websites: The Guardian Gallery