My questions have to do with interactions between the cards, so I figured I'd post them all.

1. Alex vs Hurricane Punishment- If I enhance with Alex to turn my attack face down, and then use Hurricane Punishment's enhance to discard 1 other card from card pool, if it hits does Alex turn Hurricane Punishment face down and it discards itself by it's own effect or does game memory stop it from doing so?

2. The Don's Right Hand Man vs Hurricane Punishment- If Hurricane Punishment deals damage after I use it's enhance and I react with Don's, does Hurricane Punishment's effect discard the face down card I added to the card pool or is the timing off?

3. Alex vs Hurricane Punishment vs Shadow Acrobatics- If I enhance with Alex, Shadow Acrobatics and Hurricane Punishment and it deals damage, can Shadow Acrobatics still discard the face down Hurricane Punishment allowing me to draw a card or does game memory only allow Hurricane Punishment to discard Shadow Acrobatics?

4. Alex vs Hurricane Punishment vs The Don's Right Hand Man- If I enhance with Alex and Hurricane Punishment and HP deals damage, can Don's still react properly allowing me to get the face down HP back and discard the card I replaced it with from HP or does game memory say that HP isn't an attack anymore?

1. Once it is facedown, the game no longer remembers what it is (see Alex v. Ready for Anything - attacks are no longer attacks). It can discard itself.

2. Hurricane is a floating enhance, meaning it will resolve before the trigger window for Right Hand Man opens.

3. Shadow Acrobatics cannot discard the now facedown Hurricane Punishment, because it is no longer an attack (or "that attack", either). This means no card draw. Acrobatics will discard itself, and Hurricane Punishment can discard itself, so the pool can still be clear, just no card draw.

4. Combination of numbers 1 and 2.

for clarity:

3) once the attack deals damage, if you choose to apply the Alex E first, then you cannot fully resolve the SA E. if you apply the SA E first, then you can resolve its ability as normal, and when Alex attempts to resolve, nothing will happen. the order you apply the floating E's will determine what happens.