Well, there doesn't seem to be any other explanation. Unless you believe in the supernatural.

6 seconds sound clip from the The Adventures of Superman - The Mystery of The Walking Dead classic radio series.

You can hear this line at 00:18:37 in the radio play.

Quote context

[...]

- Well, assuming he wasn't dead - that he was in a - a cataleptic trance...

- Oh, no.

- If his body was claimed before eleven fifteen and he was brought out of the trance, he could have made those phone calls.

- The man died of a heart attack. Dr. Bronson has been the staff physician here for fifteen years and I assure you that when he pronounced him dead, he was dead.

- I'm sorry he's not on duty now so he could tell it to you himself.

- Oh, now don't misunderstand me. I'm not questioning it for a moment. It's just that...

- Well, there doesn't seem to be any other explanation. Unless you believe in the supernatural.

- If I were you, I'd forget about it.

- It's too late for that.

- Miss Lane is in a state of collapse, and frankly, I'm getting worried.

- No, I've got to track this down... find an explanation for it.

- Well, I'll stop off at the Midtown Mortuary before I go back to Miss Lane's apartment.

[...]