Actually, that explanation is far from likely; it is actually impossible because of the simple fact that the patient cannot "wake up" or hallucinate until after blood flow is restored AND EEG activity returns. Therefore, if a patient who has a flat EEG AND no blood flow has a memory of a perception that happened before the restoration of blood flow, that perception is medically unexplainable.
Specifically, your explanation contradicts the evidence in the AWARE study where the patient was brain dead, had a flat EEG, perceived a sound, and was subsequently shocked; while being shocked, he still had a flat EEG and remembered feeling no pain, which is another indication that he was brain dead. Oxygen from CPR is not sufficient to wake up the patient, and this is a medical fact; you need to have blood flow to be conscious after brain death. His memory of veridical perception during brain death is medically impossible, and there are more documented cases of this type listed in the 52 points of evidence that I linked to.

I offered my proof; you can forget about BADecker; I have him on ignore. Take some time to educate yourself and do some thinking;
you have to think about the evidence because it contradicts the traditional humanist assumptions.

My proof is posted here, but it requires that you understand the implications of the evidence of NDE during brain death.
https://bitcointalk.org/index.php?topic=1054513.msg13320231#msg13320231