Chris Motley from Brahma Lodge apparently got a straight 12 week ban for reckless contact with an umpire.
I must say the Advertiser report is very light on in detail.
I have been told the umpire in question gave evidence that he thought the contact was made by him rather than the player. The other ump gave evidence that it was the players fault.
Unfortunately it is my experience that the tribunal seems to be too swayed by the evidence of umpires, particularly when the umpire appears confident. Confidence is no indication of reliability yet the tribunal (and juries) are impressed by it. Given their role you might think the tribunal might be less sucked in though.
When you are handing out life bans (as opposed to 2 or 3 week suspensions) it seems to me that the tribunal should be a little more circumspect.