These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Big Lipped Alligator Moment: Karl rides with a bus full of Israelis who pile out at stoplights and dance among the traffic. Effectively, it's a group that lives to cause BLAMs in the lives of random motorists.
To the point where Karl seemingly becomes so frustrated, he makes a run for it.
Dude, Not Funny!: Some of the things that Ricky and Steven make Karl go through is a bit much, to the point where you actually start to feel really bad for Karl. There is a fine line between 'cruel, yet funny' and just plain 'cruel', and they occasionally cross it.
Special mention goes to when they force him to stay in a really run-down hotel near the Taj Mahal, calling it a "honeymoon suite", knowing full well that he's been very ill and hasn't slept for over a day. The smell is unbearable and he nearly walks out. Plus some of the "activities" like kidnapping scenarios and shark-caging.
Ear Worm: "Seven Wonders" in the Series 1 soundtrack.