Turn 4:
The orks continue there march forward, as the bikerz cross the bridge completely to the other side, still followed hotly by Tigg and his trukkaz.
The loonz manage to make it to the other side of the river, but one of them, his rokkit pack malfunctioning, corkscrews lazily though the air, and ends up heading 180 degrees in the wrong direction!
Inside of Da Smasha, the gits finally figure out how to use the gun (much easier as it didn't move); and with an almighty KABOOM the battle cannon on the Leman Russ goes off. When the high explosive shell hits, three Space Wolf Scouts simple cease to exist, halving the unit.
The Space Wolves continue to advance forward, and are finally able to bring their weapons to bear.
The Venerable Dreadnought Biterolf opens fire on Bobz Angelz, but is unable to hit any of them with his assault cannon, as his targeting array is obscured by the large pollution cloud that hovers over them.
In front of him, the Long Fangs open fire on a visible ork dreadnought. Despite the same pollution cloud that the bikerz are throwing up, the lascannon hits the ork walker squarely, its energy bolt burning though the machine, destroying it.
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