bump just moves around let's look at some more examples again a starting point a 0 centered variance 1 Gaussian we then reduce entries on Sigma so Sigma is diagonal here setting stay acts as a line nicely symmetric point six point six it becomes a taller peak because all the density has to be closer because you're not allowed to be as far away from the mean as often so the mouse has to be more centered you can make the standard mission larger and things will spread out you can also do things that are not diagonal matrices so here again