Spikeballs are a commonly seen trap found in the Volcana. Much like their Spelunky HD counterparts, consist of a large Spikeball bound to an anchor block. They differ significantly however, namely in their method of attack.
When a Spelunker, NPC, or enemy moves beneath a Spikeball, it will, after a short delay, let loose a spikeball attached to a chain directly below it. This will damage anything it touches, a will crush both the block it hits, and anything caught between them. It will then retract a short while later. It can detect about ~8 tiles away from the anchor block, but it will extend much farther than that.
If the anchor is destroyed the Spike Ball will detach from the chain and smash through the level until it runs out of momentum, similar to a small boulder.[Needs Research]