Server's weird gravitation pull thing?

[Silmiss]

Okay, so I'm playing a Hexxit server, and I've gotten very far. I decide to give noobs at the spawn some berries, so I /spawn. Once I'm there, some type of gravitational pull thing starts to lift me in the air growing gradually fast towards one direction. Once i start to land, around me I see a cobweb with a white line going down which I have no idea what that was. After landing, I disconnected to avoid anyone trying to kill me, as someone could've been trying to get people close enough to kill.

What was that gravitational pull thing? And the white line going down from the cobweb? The cobweb must've been glowing, as it was night and I could see it clearly.

[Nosmirc]

Sounds like someone hooked you with a spiderhook. It's the best of the hookshoots, which, in addition to grabbing onto blocks for the user to pull themselves towards, can also grab entities and pull them towards the user.