Sean Henry's three part work 'Man with Potential Selves'  (2003) creates a surprising feature for passing pedestrians and passengers exiting Central Station Metro.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/24592131@N00">Terry Whalebone</a> from Bolton, UK
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/terry_wha/2547443347/">Three Painted Figures</a>