At one point, an angry fan sent a rude e-mail to Gus Sorola, the voice of Simmons who also does most of the tech work for the company. In the e-mail, permission was given to show it and the e-mail address of the sender publicly. So rather than shoot back an e-mail telling the person that Rooster Teeth does not, in fact, prevent their videos from being used on Android or that maybe the person in question should be paying attention in French class rather than watching videos, he simply put a copy of the e-mail, swears, slurs and flamebait all, as well as the persons username on the community site and e-mail. He then fulfilled every person's fantasy of getting back at rude people at work when the RT community came down on the kid.
Gavin gets one in the Minecraft playthrough. After the others take the piss out of him for a long time and steal the cobblestone from his house, he makes an iron bucket, gets some lava, and pours it on top of the house the other four are sharing. This gets Michael killed twice and Geoff dies a few times too. Then he beats a creeper to death with a torch.
In part 2 of the Minecraft Let's Play, where they were attempting an achievement wherein you must ride 500m on a mine cart, everyone made a pact to make sure Gavin wouldn't get the achievement. This led to Gavin attempting to get it multiple times despite being killed and interrupted by the others; this happened until the end of the half an hour long video where Gavin made a final attempt- wherein he (not his character, Gavin himself) was tackled by Michael in an attempt to stop him. And yet Michael couldn't stop Gavin's character and Gavin got the achievement.
Achievement City in part 3 of Let's Play Minecraft is quite a sight to behold.
Particularly when you consider it was made in at least a day... all for the purposes of pranking Jack.
The person to win the first Achievement Horse Tournament was quite surprising in the sense that it wasn't Geoff, Joel, or Jack, but was in fact Michael.
To celebrate Geoff taking his cast off, everyone in the office decided to play Achievement Horse with one hand (except Barbara, since she's inexperienced at Halo). While most people had a rough start and some eventually beat it, Michael was the only person to finish the course on his first attempt. Cue jokes about how Michael's skilled at doing things one-handed.
Gavin eventually delivering a Curb Stomp Battle to Geoff, Michael and Jack on Trials Evolution by winning two of the three sets.