Avatar randomly sprints up Alpe d'Huez every now and then, why?

When doing the Alpe d’Huez work out my Avatar randomly sprints up the hills at different points does anyone know why??

What do you mean by ‘sprints’? If you mean your avatar gets in the drops and out of the saddle, my guess is that this is because you’re generating over (I think) 465 watts of power.

I’m guessing it’s your cadence fluctuating above and below 70 RPM which causes your avatar to stand up.