Answer: What In The World Happened Here? CLXV (165):

This a statue which was originally designed to attract tourists to a motel in Cairns, FNQ. The council member assigned to approve the statue assumed the dimensions were in feet, when they were actually in meters. So this street is graced with an almost 50-foot statue, which now advertizes a popular bar down near the beach.

The local joke is that Captain Jimmy is saying "This is how high the cannabis grows around here".

A similar error happened on the way to Mars more recently.

Verum audaces non gerunt indusia alba. - Ipsi dixit MCMLXXII