Some of these are mystifying if you don't speak Dutch.
Don't let some guy shove a paintbrush under your nails, it will mess up your arm!?!?
-- According to Google translate, it is basically saying to properly care for wounds or they will get worse.
Don't let someone shove a nail into your eye, you'll be blinded! (maybe this one is about wearing eye protection when welding?)
-- The translation doesn't help so much on this one