>>17313656If you look at the way Spike is made, the nails that are on the flat piece of the board are all roughly even in length, so the weight displacement will stop them from going in deep. However, there are far fewer nails placed all along the SIDES and the diagonal areas of Spike, making them more likely to go further in to anything it hits. If Mox had fallen straight down on top of the flat part of the board, they would have stabbed him, but not go very far in. But he got suplexed onto the board, meaning he hit with forward rolling momentum. Thus, the nails on the diagonal part of Spike made first contact with him and went deeper into him than I'm sure anyone had anticipated. Since he was still rolling forward though, the rest of his weight was shifted onto the flat part of the board, taking pressure off of the dangerous area that impaled him.
Watch the clip, the parts that got stuck in him were the nails along the sides. The flat part just stabbed him a bit.
