Sorry to bump an old thread, I watched this episode again last night because I love it lol.
I haven't read the whole thread, so I'm sorry if it's already been mentioned.
When Reverse Flash is standing over Barry on the football field, it looks like RF just speeds away - at least that's what it looked like to me the first time I saw it.
When I re-watched it though, Flash of the future/Future Barry (or another speedster, if that seems far-fetched) grabs RF and they speed away together. Seriously, I'm not going crazy lol, there was a red suited arm that grabbed him!
EDIT: Found the vid on youtube, watched it in slow motion...It's not LOL! Just RF speeding away. Turned so fast it looked like another arm grabbed him though.