In the animated TV show X-Men: Evolution, there is a two-part episode called 'The HeX Factor', where Wanda Maximoff (the Scarlet Witch) is added to the Brotherhood by Mystique to give them more firepower against the X-Men.
Upon seeing Quicksilver, she goes into a rage, attacking them, only to be attacked by Avalanche and Toad. When Toad spits a wad of slime at her, she reverses it in mid-air, causing it to strike him in the face and explode.
However, when this has happened to others, the slime has stuck, blinding them. Is Toad protected from his powers, or was this just a random event?