The blades must be hung from the top straight down to the block, do you do it so then hold the knife properly. The magnets act anyway so strong that no knife is still slipped. Below, I would not have a knife dranhängen already alone because the knife could possibly be damaged, so I have not tried if it would go.
Important tip from us: dranhängen knife from above and then pushed down so that the blade is completely at the block and only the handle survives else could perhaps hurt.