Captain Unohana gently reminding members of the 11th Squad that when they're in the rest station their lives are in her hands, and they react with abject terror.

Two words Chick. Missile.

GOOOOOOOOOOD MORNING ICHIGOOOOOOOOOOO!!!!

The beach swimsuit episode, when Byakuya destroys the Shinigami Women's Association's swimming pool with senbonzakura.

Rukia Complaining About A Rescue She Doesn't Like the first time Ichigo comes to get her.

The Lucky Dance out of nowhere.

The first time Lilinette and Stark are seen together. "NOT MY BALLS!"

Rukia meets Kaien. He leaves her staring off confusedly into space smoothing out her freshly messed-up hair.

Also from the beach episode "Mune Bucket"

In the manga, after the Soul Society arc ends, with Aizen having escaped to Hollowland and Soul Society rebuilding. Byakuya in the hospital bed with Renji confessing his adoration, only to be rudely interrupted by Ichigo, asking Renji if he knows where Rukia is. Oh, and the room is on the THIRD FLOOR, and Ichigo yells this through the window next to Byakuya. Further funniness when Byakuya realizes Ichigo addressed him by first name only.

From the Zanpakuto Tales arc: The revenge of the Lucky Dance. Again, completely out of nowhere.

From the Beach episode, Unohana telling Isane which swimsuit to buy.

Chapter 398: During a seemingly serious scene Isshin gets Ichigo to stop panicking by suddenly headbutting him, nearly knocking him off a building.

Ichigo's on the verge of death... "That's strange. It feels warm....Warm....Warm..." Until he wakes up, facing Tessai which is in the same bed..."TOO CLOSE !"