Why a plank? Well, for one, it fits the pirate theme. When plugged into the Bus Pirate, the expansions also look a bit like a plank hanging out over the side of a pirate ship. As an example ...

An illustration from 19th-century artist Howard Pyle depicts a man being forced to walk the plank. Although there is no record of this type of punishment, it remains popular in pirate mythology.

The Bermuda Sloop Foundation’s [BSF] Pirates ‘Walk the Plank’ fundraising event will take place on Saturday [March 18] aboard the Spirit of Bermuda in Hamilton Harbour beginning at 11.00am.