[Though he's perfectly capable of carrying multiple people around, he wouldn't understand why this man would want something like that. If someone wanted to take Loki by surprise, that is the exact kind of thing they might want to say out loud.]

Do not worry about it. I have been bled on before. I cannot tell you how many times I have helped patch up my brother and his friends.

[He may not be a healer, but with proper supplies, Loki is capable of setting bones and staunching blood loss... at least when it came to Asgardians. He has no idea how a human would react. It's entirely possible with his strength he might accidentally (or not so accidentally) make things worse.]