Sitcoms in the 80s and early 90s would have their 'Very Special' episodes where the show would take on a serious topic. Usually these would come across as downright stupid (the Caffeine Pins episode of Saved by the Bell for one). But the "Bicycle Man" episode from Diff'rent Strokes was downright creepy. The episode starts off normal enough by very special episode standards: a warning to viewers that the topic is unsettling (adults with sexual interest in minors). But sprinkled through the 2 part episode are so many sexual innuendos casually dropped all over the place. They're not being placed there to highlight the seriousness of the topic... they're randomly stated by almost every character in the show. Worse though is the laugh track.... it sounds like a normal laugh track for the most part. One weird thing is that the laugh track is even used while the Bicycle Man (Mr. Horton) is talking about or showing sexually themed things to the kids. The other really f'd up thing is how intense (almost maniacal) and childish sounding the laugh track becomes when the kids are looking at this stuff. Around 16:44 and 37:17 in the video are a couple of good examples.