The 'lifeguard' (circled) on a High Speed Train powercar.
Source: The original image is Image:43300 at Kings Cross.jpg, I cropped the image and added the highlighting red circle using The GIMP. http://en.wiktionary.org/wiki/File:Lifeguard_on_Class_43_powercar.jpg
Author: Original image: User:Oxyman. Modifications: Chris McKenna (Thryduulf)