"There's something I could try... but it's too early for that." Eren's voice goes from speculative to uneasy, and he too stands and starts prowling around the room. "Ah... actually, wait." Going over to the autopsy table, he produces a scalpel after a momentary search, absently wipes it clean on a corner of his shirt and returns to hand it to Hijikata.

"Try stabbing my finger with it."