"Coke? ... I'm guessing you mean the soft drink?" Or he hoped beyond hope because no way were they going out to score some drugs. He liked Sherlock and all but he wasn't quite ready to help with all that. Frowning, he gave Sherlock a confused look. Perhaps the burden was to awaken lost cravings or something? He really hoped Sherlock wouldn't be going through withdrawals. He needed a guide.

"Err... tell you what, for safe reasons, can you pass me along the map please?" John requested, holding out his hand and smiling slightly, just in case he needed to keep it safe.