The healthy 17-year-old Zack Clements of Brownwood, Texas was just about to be pronounced dead when he regained a pulse. But what he says he saw while unresponsive has doctors stumped.

According to the report, Clements suffered sudden cardiac arrest at Victory Life Academy on May 5 and was unresponsive. He woke up in the intensive care unit days later; doctors still don't know the cause of the heart attack.

Perhaps even more amazing is what he says he saw before he was revived.

He told CBS Dallas-Fort Worth: "When I was out those 20 minutes, I saw a man who had long ruffled hair and kind of a thick beard, and it didn't take me long to realize that that was Jesus."

Clements' family can't explain it, but they are accepting that it is real. Zack told reporters that it has strengthened his faith.

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