Reflux

Reflux (real name Gus Burns) is a character in Disney Pixar's Incredibles 2, who is part of a group of second-rate Supers who aspire to join the ranks of superheroes.

He is a senior who has the unsettling super power of heaving hot lava, which helps him break into some of the most secure locales.[4] As an old man, he gets tired easily and has motion sickness problems, which can be fatal for someone can barf hot lava. When Relflux is on the offensive, he is the most offensive hero around.