This came up in my last game. I had a Haemonculus in a raider attempting to liquify a unit of scouts in an upper story of some ruins. My opponent's position was that the template needed to be tilted upwards from the vehicle to the scouts (which meant hitting less of them). I couldn't find anything in the rules saying that the template had to be parallel to the the table, so we played it with the angled template. Did we do that right?
Dark Eldar plog: Drug-Crazed Space Elves
Stupid humans plog: Calyptra's Stupid Humans
Vampire Counts plog: Bat Country