Wait, so someone discovered his body....and tossed him in the "dump site" without taking his armor and weapon? BS# 1
The fact that they chose the perfect time to dump the body. BS# 2
He had a good enough grip on this weapon and fell straight down in the perfect spot to stab the cyclops? BS# 3
The cyclops who paid no mind to multiple sharks tearing into him, but this single sword strike affected him? Actually not BS lol, gotcha! Taking a blow you know is coming and one you don't are two different things, plus the force from the fall.
Oh well, saw a sheep paddle....I'll just ignore the BS and re-write it in my head that a huge rock just happen to fall due to the force of his pressure based evil eye.