Lagback

Lagback refers to getting teleported back to a previous position. The causes for lagbacking are various, but most are probably not intended, for example:

• Colliding with a boat
• Falling (while sneaking)
• Moving inside a cactus too quickly

Lagback can be abused to clip inside walls, or jump higher in a similar fashion as Blips. This practice may be a bannable offense on multiplayer servers. In this article, we solely focus on singleplayer 1.8.

Explanation

The lagback itself is caused by this portion of code (in class NetHandlerPlayServer):

Test{
}

The reason why this portion of code activates is different for each of the aforementioned inhibitors.