Check this link for a good "real tickling" shot. Judging from the victim's reaction, the tickler did not have her where he wanted her for long. (Too bad we can't see her all of face, but from what there is, she's in tickle agony.)
http://www.greasyelbow.com/korea/usa/road-trip/rt2-gadi-tickles.jpg
http://www.greasyelbow.com/korea/usa/road-trip/rt2-gadi-tickles.jpg