LET'S TALK CHESS, CHAMPS
'(<a href="http://www.j-archive.com/media/2009-03-16_DJ_15.jpg" target="_blank">Jon of the Clue Crew demonstrates with a chessboard.</a>)  White can't move his <a href="http://www.j-archive.com/media/2009-03-16_DJ_15a.jpg" target="_blank">knight</a>, because doing so would <a href="http://www.j-archive.com/media/2009-03-16_DJ_15b.jpg" target="_blank">expose</a> his <a href="http://www.j-archive.com/media/2009-03-16_DJ_15c.jpg" target="_blank">king</a>; the knight's said to be stuck to the king with this tactic, named for a pointy little object'
pinned