The wall of headaches

A group of scientists finds an ancient alien building.  One of the inside walls, at the end of the hallway, at first seems like a simple dead end save for markings down most of the hallway.

But people notice that looking at the far wall for any length of time induces headaches.  One person forces themself to look at it so long that they begin to have seizures and goes into a coma.

But one person who looks at the wall feels not the minor headaches, but an immediate surge of debilitating pain--which then subsides.  Then, they notice they can "sense" the cause of the headache.  The wall is an illusion, he realizes.  He goes to touch it--something nobody has done for some reason.  But it isn't an illusion.

The person is convinced of the illusory effect, but starts to realize he is sensing far more than another shape of the wall--he can sense all shapes and movements around him.  With eyes closed, he cannot drown it out.  He has trouble sleeping.  As time passes, he becomes sensitive even to liquids and gasses in motion--to the point of distraction.  He's committed to a mental hospital, because nobody can confirm what he claims.

In the hospital, the person's new sense takes more solid shape, and he convinces a doctor he can "see" things that he shouldn't.  Like fingers under a table, people in another room, heartbeats of people around him...

Then, he realizes that he can push these sensations away.  At first, it merely makes him able to sleep.  But soon he realizes the push actually has a physical manifestation.  Things push away from him.  Once, he catches himself--and catches things in midair as they push away.

He has discovered telekinetic abilities.

He goes back to the wall, and there is able to push the shapes nobody can see.  It unlocks a room...