Yep, Darla from Finding Nemo is huge. Also from "Nemo" the scene where the submarine dislodges and falls into the abyss -- not as utterly "big" as the Darla scene, but deeper.
Another good scene is the "Emerging Pods" in War Of The Worlds.
The "Ring Drop" scene from one of the Lord of the Rings movies -- can't remember which one right now; it might be the first one "The Fellowship of the Ring" where Sauron's finger is cut off and the ring hits the ground... Good, tight, deep.
Have fun!