The actual clip is only slightly longer than in the comercial, but w/ audio. Her laughter is kinda "soundless", and she's going "Oh go(d)! Oh sto(p)!" But, like Mimi suggested, if u watch Fez's reactions CAREFULLY, it DOES look like he's just shaking her about, BUT, if u watch Donna's reaction's CAREFULLY, her reactions TRULY look like tickled reactions, as she throws her head back and squirms madly 2 try and get away. I guess u had 2 have been on the set 2 actually confirm the situation, but still, it could very well b tickling.