Accio horcrux

[slegendre]

Something has kinda baffled me since I read it in HBP, maybe it’s because I misunderstood, or maybe its cause I don’t quite understand the Accio summing charm, but its when DD and Harry were in the cave looking for the locket. Harry called "Accio horcrux" towards the middle of the lake, towards the greenish light, and something jumped out of the water.

It made sense that the thing jumping out of the water was protecting the horcrux, and DD even made a comment that he was sure when they take the horcrux it will awaken the bodies in the water.

But if the locket wasn’t the horcrux, then why did the Accio charm make the body jump to seeminlgly protect it?

Anyone have any insight?

[bookworm777]

Dumbledore answers this himself. He says that Voldemort wouldn't be fooled by an Accio charm and placed a spell over the Inferi that if the Horcrux was Summoned, the Inferi would attack. The only thing I see wrong with what Dumbledore said is that the Inferi dodn't walk from the water and attack them, but jump into the air and remain calm until Harry touches the water. Hmmm. It sure is an odd scene.