I would have to say:
JAWS:
-Bruce smashes the Orca
-Quint's death
-Ben Gardener's head "suprises" Hooper
DEEP BLUE SEA:
-The Big One attacks the scientist and rips off his arm
-Samuel L. Jackson's death
-L L Cool J stuck in kitchen
-Jaws reference No. 67 (final shark blows up)
Well, that is all I could think of.
The inflatable shark bomb in Batman from 1966.
What was that one?