She noted how flustered Sherlock was, and watched him run off before turning back to John.

"He'll be back. Yeah... first aid kit. A very bloody first aid kit."

She opened it up and surveyed the contents before reaching for the antiseptic.

"The wound is pretty even, which is good," she said, pouring some antiseptic onto a gauze pad. "Easier to stitch up. This will sting."

She starts washing the wound.