Scaramanga
Senior Member
I came across this illusion on Facebook, and I think it's closely related to the discussion of interpreting giant triangular craft from three lights in the sky (discussed in this thread e.g. here):
I think it's more profoundly absurd and basic even than that. I think a segment of the population simply don't realise that 3 lights will produce a triangle by default. I mean, there is no other shape that 3 lights can produce ( except in the rare case of all being in a straight line ).