Basic technique to limit Velocity of Pyro using Gas Analysis calculation and then clamping using a Gas Wrangle... Pretty basic... File Link

Easy and fastest cheap way to create blood flowing effect in Houdini with ZERO Collision. File Link

This is the shortest way of doing it. Will try to get a better way in NOT THE POST but on the SIMM itself. File Link

Add Rest and Rest2 fields for POP Particles in Houdini... File Link