Iron sky movie (if u don't know, google)

there's a thunderstorm but it's raining iron

It's raining boats and bolts.

Man about to be hit by a model boat and nails

A small boat flying at a young man with a trendy hair style. Also nails.

A huge knife is heading straight for the scrawny, teenage-looking Johnny Bravo! There are also some nails and screws and stuff lying around