« Super Street Fighter 4 Guy Instant Kaiten Izuna Otoshi »
This video shows how you can punish a lot of moves with Guy's Instant Kaiten Izuna Otoshi. This attack does a nice chunk of damage and it looks like if you get the technique down you can do it on reaction to a ton of moves. Thanks to ShipWatt for sending this in.
YouTube Description:
The instant air Kaiten Izuna Otoshi is very useful but you will need to learn the spacing as well as the right time to use it. Don't overuse it. Use it a few times to let your opponent know that they can be punished.
The specials that show me reacting with EX mean I'm pretty sure they can only be stuffed with EX. I've tried with the regular version and couldn't pull it off.
I read that Honda's head butt can also be stuffed but I couldn't pull it off. I'm sure there are a few others I didn't film or try, but for all purposes considered, they're probably not very practical. The ones in this video all have their place in battle and I hope it helps all you Guy players.