Particle emitter, Newtonian influencer

Hi, look at the video:

This is my attempt to make an effect of splashing blood. Particles should start in one point, then they should go to all sides, moving upward at the very beginning and then falling down with gravity. The problem is I can’t force them to move to all sides, they have a tendency to move in one direction. I was trying with different values, here are the actual configuration:

Any idea how to do it?