At about the 4:27 mark the view is from the side so you get a better appreciation about his height (taller than the clerk). By the way, aside from the skittle what did he buy? Was that a can of Old English 800 beer? Otherwise why the need to put it into a plastic bag?
Two other questions came up that he looked uncomfortable with:
After the purchase Martin went to the back of the store and picked something up and this clerk watched him do it and yet on the stand he played stupid. Even Guy noted it.
What could he have picked up???
He bought the Skittles and a can of Arizona Watermelon Iced Tea. Apparently one or both are used in combination with cough syrup to make a mixture to get high.
What struck me from the video, besides the obvious difference in sizes between the adult clerk and the “innocent little Trayvon” is that he looked stoned as he wandered in and around the store for 9 minutes.