I agree with most of what you guys are saying. I feel that because Prince Charming was in a “dream state” almost (I say almost because he could have been on his death bed kissing the earth goodbye as he floats to heaven or to whatever) just before the curse hits, he may have been able to retain some memories, but the curse is trying to stop him from remembering and he may be battling with the curse within himself. You can compare it to how Graham had been before he died. He saw Emma was angry with him and that brought up negative mojo. How he was so confused, regretful, and was looking for answers . He was trying to understand why he couldn’t feel anything for Regina. Perhaps when David was full of concern with Kathryn, it brought back terrible emotions that is driving him to try and remember what is going on within him. He’s looking for answers, basically, and that’s why he’s like going nuts. Gosh, someone needs to tie him down or something. Can’t have the pretty face getting scratches.