But didn't that huge blast door puncture John Locke's leg (broken or fractured bones, blood vessels crushed,mashed muscles, who know what else?) and he was up and around VERY quickly. They've only been on the island days not years. If I recall Jack (or whoever in the Swan) wanted to go get the wheel chair for John - his injuries looked THAT bad. I think the island healed him of his blast door injuries at a remarkable rate.