Limits to TK

“I need schematics of the elevator’s mechanical system,” I told them.

Velvet looked at me oddly. “Why?”

“The locking mechanism is at the bottom where I can’t see it.” She continued to look at me blankly. I sighed. “Look, I need to know what I’m doing before I can do it.”

I looked at them. Of course they didn’t understand. SteelHooves had no clue about magic at all, and Velvet Remedy’s levitation magic was comparatively foalish.

“It’s the same reason I can telekinetically fire a gun or pull the power supply from a turret even if I can’t see it, but I can’t use my magic to squeeze somepony’s heart or build a rifle while blindfolded. If I can’t see what I’m doing, I need to be able to picture it in my mind with a fair amount of accuracy or the magic won’t manifest,” I explained, hoping I didn’t sound patronizing.