If you thrown the potion on the ground. It's spawn splash particles wrong position of the player.
Environment
OS : Windows XP (x86) 5.1 Service Pack 3
CPU : Intel(R) Pentium(R) 4 CPU 2.80GHz
RAM : 1 GB DDR RAM
Java : Java Development Kit 1.7.0 Update 65 (Used for making my mods)
OpenGL : Intel 845G GL Version 1.3.0 - Build 4.14.10.4342
Dupe of MC-45749