"Gesundheit," Derek jokes, hissing slightly as the needle first pierces his skin. After that it just turns into a dull sort of ache, and Derek watches as Oliver stitches him up. There are very, very few people that Derek would trust enough to stick a needle into his skin, and Oliver is apparently one of them.

"So, you're working with the mob?" Derek asks after a moment, genuinely curious "Why are you keeping tabs on them then?"