--NOT GUARANTEED TO WORK TYPED LATE AT NIGHT FROM NOTHING
function Create(self)
self.oldpos = self.Pos --set the old position
end

function Update(self)
self.numberofdivisions = math.random(4,6) --some randomness never hurt.
for i = 1, self.numberofdivisions do
local particle = CreateMOPixel("<PIXEL PRESETNAME HERE>", "<RTENAME>.rte")
particle.Pos = self.Pos - (SceneMan:ShortestDistance(self.Pos,self.oldpos,true) * (i/ (self.numberofdivisions + 1)))
--the above should position a mopixel (which i assume you're using) a fraction of the distance the particle has traveled.
particle.Vel = self.Vel * (math.random(8,12) / 10) --more random, this time velocity
MovableMan:AddParticle(particle)
end
self.oldpos = self.Pos --set the old position again, at the end of the function so it works for next time, but doesnt ♥♥♥♥ it up now
end