"He's getting huge. That means he'll only be stronger. That means he won't be as fas-OH GOD HE'S STILL AS FAST!"
But Alaric, for all his size and the weight of his armour, was a Space Marine, his body enhanced to be quick as well as strong.
Lord Ebondrake was a huge reptilian creature... His long, sinuous body and enormous wings moved with a speed and grace alien to his size.
Speed is... weight. Have you ever been kicked at the speed of light?
Admiral Kizaru, One Piece
The Infernal Monster shouldn't be fast enough to strike as it does. Nothing that strong should be so fast. It's just not fair.
— description of Shock and Awe Slam, Exalted
Brock Lesnar is a human cheat-code. He is 300 pounds of muscle and judging by the way he darts around, I don't think mass and inertia were properly explained to him.
For such a big guy, Pindar is pretty light on his feet. I know I certainly wouldn't want to be in a fight with a robot who can punch holes through my chest and jump all the way across a room like that.
"Big but slow... small but fast... There's millions of those. Someone so big and fast like Murasakibara, i've never seen that before."
—Aomine, Kuroko No Basket
"Tank by itself is fearsome. Fast tank is even more fearsome. Fast tank flying through air and trailing dust, flame and entrails of slain enemy is like hand of God ripping swathe through advancing horde of enemies."
"Not just fast, powerful"
— Might Guy, Naruto