Harsher in Hindsight/Web Comics

• An extremely fast one in Scary Go Round, which introduced a parody of Michael Jackson with a Creepy Child servant just a couple weeks before his death. The author commented:

John Allison: The last thing anyone expects, when they have introduced a character who is a kind of grotesque version of a world superstar, is for that superstar to die. It is entirely possible that Michael Jackson sat down to read Scary Go Round yesterday, began to turn slowly purple at what he saw, and collapsed clutching his arm. Actually I know that isn't true. Jackson was on record (citation needed) as more of a Dresden Codak man.

• Xkcd: The mouseover text for strip #625, "Collections", reads: "You know what really helps an existential crisis? Wondering how much shelf space to leave for a Terry Pratchett collection."
• The last page of this Questionable Content strip has this effect if you've read through the rest of the series.
• Sinfest, October 16, 2001: "They all start down the dark path cuz they couldn't get laid!" Flash forward to April 2018, when a self-identified "involuntarily celibate" used a rented van to kill ten people in Toronto.