After a long night of watching Lucille work overtime, Rick needs some peace and quiet and day dreams of a more peaceful time in his life on top of the RV. It’s at this point that he regrets the moment he and his team ever came face to face with Negan the most.
In the comics, Rick also falls asleep on top of their vehicle, but there’s one minor change. It’s at this point he and his team first meet Negan and his band of misfits, and as you now already know, it’s all downhill from there.