In the forested west end of Ladner Harbour Park, greenery suddenly looms above you, reminiscent of the Knights Who Say Nii. These are vines of English Ivy, Hedera helix, a native of Eurasia and North Africa, and multiple escapee from hanging baskets, planters and gardens here in BC, and elsewhere. It can smother native plants, even the towering cottonwoods of this forest. It denies sunlight to its host, and can increase the susceptibility of host trees to toppling in windstorms. (More on this plant as an invasive here at Evergreen.)
The Knights of Nii wanted a shrubbery. Unfortunately in the clip (linked above), that last crucial word was cropped -- which is what needs to be done to the invaders of the Ladner forest, invaders that themselves are a shrubbery.
(And not one that looks nice.)