Well, he's going to be one sick individual if he's coming up on his motorbike in the pouring rain. You can't tell them anything...they always think they know best. He'll be crying the blues about the sniffles...wait and see.
Stay positive...it might not be weird at all. He may just sit there quietly and then tell you what he thinks later.
Enjoy your Sunday!
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.