Tom said it was based on the drum pattern and structures from the early days when him Ed would hit the summer raves in Blackburn. The warehouses didn't have AC, which made it extra hot back then and of course, acid was the thing.
The samples come from early morning cartoons that would be on when they would make their way back home. It's all just an ode to those good ole days.
Of course, I just made all that up, but just go with it.