As a child, believing the sun to be a ripe mango, Hanuman pursued it in order to eat it. Rahu, a Vedic planet corresponding to an eclipse, was at that time seeking out the sun as well, and he clashed with Hanuman. Hanuman thrashed Rahu and went to take sun in his mouth preventing the scheduled eclipse.
http://www.youtube.com/results?search_query=HanumanandRahu
