You could also think about a jump discontinuity. So let's look at this. And all of this is hopefully a little bit of review. So a jump discontinuity at C, at x equals C, might look like this. Might look like this. So this is at x equals C. So this is x equals C right over here. This would be f of C. But if you tried to evaluate the limit as x approaches C of f of x, you'd get a different value as you approach C from the negative side.