"They're Screwin' With The Wrong People."
Following the fall of the prison, Rick and the rest of the survivors eventually found what they thought was a safe haven, only for the group to be herded into a train car like cattle by the cannibalistic Terminus inhabitants. After being reunited with his fellow survivors, Rick knew exactly what his group was capable of and that they would find a way out of their current predicament.
It was a perfect tease for what was to come and Terminus did eventually find out the hard way that they were indeed screwing with the wrong people.It was an epic moment and a shining example of The Walking Dead doing a season-ending cliffhanger masterfully.
Rick Threatens Gareth
Rick has never been the type to plead for his life, and that didn't change even after being brought to the slaughterhouse at Terminus. Instead, Rick uses that sole opportunity to not only threaten to kill Gareth but explains to him in detail exactly how he plans on doing it. Even at his most helpless Rick has proven to be a total badass.
Rick Butchers Gareth
What could have been more epic than Rick threatening Gareth? Rick actually following through on his promise.
After Terminus disbanded, the few remaining members attempted to enact some revenge on Rick's group, only for Rick to end up turning the tables. Rick kept his word as he proceeded to brutally butcher Gareth with his trusty red-handled machete inside Gabriel's church, effectively putting an end to the Terminus arc.
Preventing A Rebellion
Rick's arrival at Alexandria was met with skepticism among its inhabitants. Prompting a small group to conspire to eliminate Rick and his fellow survivors. However, Rick quickly put an end to rebellion as Rick rolled out one of his best monologues: “You really think you're gonna take this community from us? From Glenn? From Michonne? From Daryl? From me? Do you have any idea who you're talking to?”
Rick And Pete's Brawl
When Rick attempted to get Jessie to leave her abusive husband, Pete showed up and confronted Rick which sparked an all-out brawl that spilled out onto the streets of the community. Rick ended up beating Pete to a bloody pulp, but when Deanna attempted to put an end to it and labeling Rick as a threat, he went on a furious tirade. Fortunately, Michonne stepped in to knock Rick out before the situation could escalate.
Rick's Walker Onslaught In Alexandria
Witnessing his love interest, Jessie, getting devoured by walkers on the season six midseason premiere was a tough pill to swallow, but the realization that Carl had been critically injured after being shot by Ron sent Rick over the edge. After getting his son to safety, Rick went into full-on berzerk mode and began viciously hacking his way through the walkers that had overrun Alexandria.
Rick's rage-fueled frenzy culminated in a visually mesmerizing sequence of quick cuts of the entire group coming together to dispatch the remaining walkers and was one of the more stunning shots of the entire series.