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"I had my pocket knife in my pocket. I said, 'The only way I'm getting out of here is to cut it off,' so I just started sawing at it," Kaser told the television station.
He felt every cut as he amputated his leg.
"When I was cutting it, the nerve endings, I could feel, like, the ping every time I sawed around that pipe, and all at once it went and let me go and I got the heck out of there," Kaser told KETV.
He crawled to the nearest phone, 150 feet away and stayed conscious through the entire ordeal, even being loaded on a medical helicopter.
He has healed and gone through physical and occupational therapy with the goal of getting back to work.
"He told me his goal, basically, 'I need to get home and get back to what I was doing before,' which was farming," Dani Willey, Kaser's occupational therapist, told KETV.
Kaser was released from the rehabilitation center last week, but still has a way to go. He has more healing before he can get a prosthetic leg, KETV reported.