Dad had a saturday job in Aberdeen docks as a child. Apparently they used to dock Banana boats there many moons ago.
As the grab crane lowered them onto the dock all the spiders that had hatched on the trip ran out. They were stood around the outside with brushes and other implements to squish them before they escaped. He said that sometimes it rained them. It was only later he found out that often they were tarantulas. Not certain if it was true but it put the jibblies up me!