As soon as Aubrey caught Artie's attention, the tight line that was his mouth relaxed some, his eyes warming. It was his friend. Someone who could understand him! It was a blessing, and Artie made sure to remind himself of that fact later when he was meditating - if he managed to even do that for a while. It was as if the scene was burned into his skull.
His arms were flying out to his sides, foot moving back to the floor to help keep his balance. Man on a cross, looks dead - he cut himself off when he heard the Charles's wheelchair, attention going to him. He watched Aubrey dash away, fear taking over his eyes again. He didn't know how much use a man in a wheelchair would be with all the snow that was outside. But still, the man was in charge and if anyone could summon help, it'd be the strongest telepath on the planet.
It didn't even occur to Artie to talk to Charles telepathically. He started signing, fast and furiously, trying to relate everything he'd done to get back to the school, pointing to his foot for a moment to explain why it took him so long to get back. Realizing midway through that this was Not Helping, a pictorgram appeared beside his head.
The gates were seen but quickly forgotten, hopefully helping Charles get a general location of where he'd seen it. The man was near naked, hands and feet blue, strung up on a cross. Artie was so worked up that the image began to enlarge itself, trying to recall all the gruesome details so that Charles could see the man's face. With the illusion still beside him, he stomped his good foot, arm making a shooshing motion to the doors. We have to help him!
Hearing footsteps, he began to turn and reach for the doorknob, refusing to just stand there while someone died, if he wasn't already dead.