Monster trucks for monster tricks.
Monster was a project of Jamie Thomas in the early 2000s. The trucks were distributed by Giant Distribution. They went with a scary theme for the trucks and ads.
Sam Korman's interview with Heath Kirchart in Plank was an interesting read, but he dropped the ball by not asking about Monster Trucks. I'm going to assume that part was edited out due to a lack of space.
The photo for Heath is credited to Oden. Might it be a typo for Luke Ogden?
Heath: Transworld - March 2002 Volume 20 Number 3
Trainwreck: Transworld - April 2002 Volume 20 Number 4