Add Comment to "moments" in an Activity
Rather then a general comment section for an entire ride, I thought it would be cool to tag individual moments of a ride with a comment. It could work like Soundcloud, which provides small comments tagged at moments in a song. I went on a long ride on Saturday and saw deer at a certain part of the trail. I thought it would be cool to mark that spot with a comment rather then saying "I saw deer at some point on our hundred mile ride". You could also tag points in a ride with advice for particularly difficult climbs or convenient rest stops a long the way. Bonus points if you could link photos taken during the ride in Imgur to the comments.
I see my friends going on these super interesting ride, but in the end, they're just another blip in my Strava activity feed. This functionality can turn every ride into a story.