wait-a-sec
Explanation
The Joke
Two people are pulling a rope to rescue someone who has fallen into a well. The person in the well, rather than being grateful, calls out: "Wait a sec... Do you guys REALLY want to save me from drowning, or are you just virtue signalling?"
The joke satirizes the modern tendency to accuse people of "virtue signalling" -- the claim that someone is performing a good deed not because they genuinely care, but to publicly display their moral superiority. Here, the accusation is applied to the most straightforwardly genuine act of kindness imaginable: physically rescuing a drowning person from a well. There is no social media audience, no public platform -- just two people hauling on a rope to save a life -- and the person being saved still questions their motives.
The Humor
The comedy works by pushing the concept of virtue-signalling accusations to its most absurd logical extreme. In online discourse, "virtue signalling" is often lobbed at people expressing concern about social issues, where one might at least debate whether the concern is genuine or performative. But accusing someone of virtue signalling while they are actively, physically saving your life is so paranoid and ungrateful that it exposes the absurdity of the accusation itself. The comic suggests that if you are committed enough to doubting others' sincerity, no amount of evidence -- not even risking their own safety to pull you from a well -- will ever satisfy you.