Burning sensation during overhead tricep extensions.

Why do I feel strong burning sensation in one particular area of a left tricep when I do dumbbell overhead tricep extensions? Like someone holding a lighter near my arm.

I don't feel anything like it in any other exercise. Not even in pushdowns or dips which I also do for a triceps.

Does it mean that my technique is bad? Does it mean that my technique is good? Should I stop doing this exercise?