There were only two moments that were completely awesome in the episode, but their awesomeness have no bounds (yes I don't care if my spelling/grammar sucks and I am using fictional words, tis the entire point.)

Arya laughing out loud at the black humor of another one of her family members dying 3 days before she gets there. At least the hound gets to suffer with her

And the total victory of the viper, followed by the total loss by him tripping at the finish line.

"...If you die before you say her name, ser, I will hunt you through all seven hells,” he promised.

Ser Gregor tried to rise. The broken spear had gone through him, and

Prince Oberyn moved closer. “Say the name!” He put a foot on the Mountain’s chest and raised the greatsword with both hands. Whether he intended to hack off Gregor’s head or shove the point through his eyeslit was something Tyrion would never know.

Clegane’s hand shot up and grabbed the Dornishman behind the knee. The Red Viper brought down the greatsword in a wild slash, but he was off-balance, and the edge did no more than put another dent in the Mountain’s vambrace. Then the sword was forgotten as Gregor’s hand tightened and twisted, yanking the Dornishman down on top of him. They wrestled in the dust and blood, the broken spear wobbling back and forth. Tyrion saw with horror that the Mountain had wrapped one huge arm around the prince, drawing him tight against his chest, like a lover.

“Elia of Dorne,” they all heard Ser Gregor say, when they were close enough to kiss. His deep voice boomed within the helm. “I killed her screaming whelp.” He thrust his free hand into Oberyn’s unprotected face, pushing steel fingers into his eyes. “Then I raped her.” Clegane slammed his fist into the Dornishman’s mouth, making splinters of his teeth. “Then I smashed her fucking head in. Like this.” As he drew back his huge fist, the blood on his gauntlet seemed to smoke in the cold dawn air. There was a sickening crunch. Ellaria Sand wailed in terror, and Tyrion’s breakfast came boiling back up. He found himself on his knees retching bacon and sausage and applecakes, and that double helping of fried eggs cooked up with onions and fiery Dornish peppers.

He never heard his father speak the words that condemed him. Perhaps no words were necessary. I put my life in the Red Viper's hands, and he dropped it. When he remembered, too late, that snakes had no hands, Tyrion began to laugh hysterically.”