I think the story behind that finger sign goes like this:
The two of them were having fun dancing.
Suddenly," Zin the Stripper" interrupted their lovely moment by showing some stripper skillz he got.
And because of that, he was punished. Punishment: SQUASHED TO DEATH. Finger sign as complementary decoration.
LOL, I don't know. I just happened to see the word "punishment" as the caption of the last pic in the blog, and since it goes in that sequence as well, that's probably it. XD