The shaman asks the tank to go a little fast, and I see both have the gear to back up the recommendation. Saboteur Kip'tilak goes down fine enough, and the tank is moving at a reasonable pace, not too fast though. It's not until Striker Ga'dok that I notice something strange.
I see the Rogue standing out at range, spamming Shuriken Toss. I glance at recount, and sure enough ST is making up 75% of his damage. I inspect him and discover full PvP gear. Kill off Commander Ri'mok and venture on. Right before Raigonn, however, I call out the Rogue's usage of ST. Conversation is transcripted word for word.
Me: "So, you're doing less than the tank and I could easily out-dps you as a healer."
Rogue: "u cry"
Rogue proceeds to take every chance at jumping up to hit the Weak Spot, leaving our top dps, the Enh Shammy, to dps the adds on the ground. 3rd slam, I Grip the Rogue away and jump up myself, knowing I'd do a heck of a lot more than him. Carapace breaks and we finish off the boss. Dps for Raigonn looked like this:
Looking over it, I see he actually took the time to dps normally as Combat, probably because he couldn't ST the weak spot. He did still ST his little head off once the Carapace came off.