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As worried as barbara's parents. disappeared, david jackson had finally been found. the question now was what particular her dad. happened to him? a marine that was not so how did he end up here? impressed with mr. jackson. >> coming up, a strange >> he didn't liked him. consequence or was it? i don't know why. >> still david said his mother >> it's an eerie feeling that he was walking on air. heon came home one day and said was in that area that i didn't i'm going to have to sell the even know about. >> when dateline continues. truck. i said why. even know about. >> when dateline continues he...

He's just my first love. >> reporter: two youngsters in love. and then -- well, things happen, don't they? >> mom, i got something to tell you. i said, "what?" they said, "barbara's pregnant." >> reporter: and judy was surprised. a little worried maybe. but nowhere near as worried as barbara's parents. particularly her dad, an ex-marine, who was not very impressed with young mr. jackson, or so judy heard. >> mr. britton did not like him. i don't know why. >> reporter: still david, said his mother, was walking on air. >> he came home one day and he says, "well, mom, i'm going to have to sell th...

Person and metabolism. stopping the flow of poison to your heart may seem like the right idea. >> using tourniquets may be appropriate in certain instances depending on the nature of the bite, the species involved. >> but be careful because while you may be blocking the flow of venom you're also cutting off blood flow to your limb which could lead to irreversible tissue damage and amputation. for david that's not an option since there's no tourniquet for the stomach. >> the thing that got me mentally traumatized the most is knowing where i got bit and how close it was to a lot of my vitals. ev...

>> c is the wrong answer. the venom can kill in as little as 60 minutes depending on the amount of venom delivered, the victim's size and metabolism. stopping the flow of poison to your heart may seem like the right idea. >> using tourniquets may be appropriate in certain instances depending on the nature of the bite, the species involved. >> but be careful because while you may be blocking the flow of venom you're also cutting off blood flow to your limb which could lead to amputation. or irreversible tissue damage. for david that's not an option since there's no tourniquet for the stomach. >...

The venom starts. i just whacked four veins so i'm dead. i'm bleeding to death, you know what i mean? >> c is the wrong answer. the venom can kill in as little as 60 minutes depending on the factors like the amount of venom delivered, the size of the person and metabolism. stopping the flow of poison to your heart may seem like the right idea. >> using tourniquets may be appropriate in certain instances depending on the nature of the bite, the species involved. >> but be careful because while you may be blocking the flow of venom you're also cutting off blood flow to your limb which could lead...