Here are several rules from a friends game couple of Fridays ago.
JJ typing, Moving Flat Out 40k6 pg 72
A vehicle can elect to move Flat Out instead of firing in the Shooting phase, immediately move up to 6"; this move trigers Danger Terrain test as normal. A Tank cannot move Flat Out in the same turn that it performs a Tank Shock.
Context: Suijin wanted to know if a Rhino can flat out after troops disembark. Never encountered this rule before. Yes it can.
Template Weapons 40k6 pg 52
Instead of rolling To Hit, simply place the template so that its narrow end is touching the base of the firing model and the rest of the template covers as many models in the target unit as possible, without touching any other friendly models (including other models from teh firing model's unit).
Context: Suijin pulled a smart move here. Instead of targeting the zombies he targeted the Plague Marines behind them.
Allocating Wounds, Effects of Damage on Passengers 40k6 pg 80
Resolve these as for shooitn hits, except that the controlling player allocates any Wounds caused.
Context: It was wondered who allocated wounds when a vehicle explodes. Don't remember this rule coming up before.
Independent Characters 40k6 pg 39
He cannot join a unit that is locked in combat or falling back.
Context: Squad of Sisters were falling back. Suijin asked if an Independent Character can join a squad that is falling back. He was pretty sure it couldn't happen. Wanted to make sure. After looking in the correct section of the book Suijin was right.