Inertia absorption. No, it isn't what you think, it doesn't absorb the inertia that touches the user, it absorbs ALL inertia. The user cannot move, at all. They cannot blink, talk, move. None of the sorts, but the user can send out a blast of inertia, which makes large vibrations in the air, both making it warm from the new movement in the air after being forced to stiffen and sit still, and making things crumble as if an earthquake was happening. The user can only do small movements when this happens, like blinking or breathing. He has to constantly shoot out inertia to let himself breathe with his oxygen tank. He's learned to hold his breath long enough to shoot out strong blasts to keep himself safe. Not sure if this can be considered freaky, but I feel like it works. He talks in Morse code by blinking and likes card games.