"No, he's not," he winces and rubs the heel of his palm against his forehead. "I was surprised by a young Severus Snape who tried to make 'my' mark visible and that was the result."

Now Malfoy can more clearly understand why he was so cautious when they were living in London. If they'd accidentally triggered this not-Mark while in his own world, the outcome could've been disastrous.

"After that, he recognized me."