I think this is the episode where Willis attains a big bag of grass and gets high off some marijuana. It's so ridiculously unlike when a person really gets high that it cracked me up big time. I love this episode more than most from this great series.
You add a sequence involving a big bag of weed with a great sitcom like Diff'rent Strokes and it makes for a top notch episode. Arnold's one-liners and the look on Tooti's face when she opens Willis's drawer and finds the big bag of grass is absolutely priceless. And my oh my is Mr. Drummond upset and disappointed as to how Willis could bring the green into his house. But c'mon Mr. Drummond...it's not like it was crack-cocaine or anything. I wish they had more episodes devoted to marijuana...whether it was Arnold's involvement, Dudley's involvement, or whomever. It makes for good television viewing.