Mountain Home AFB, ID - USAF Thunderbird pilot ejects from aircraft during approach due to low altitude. The pilot was accustomed to performing this maneuver at Nellis AFB, NV (Home of the USAF Thunderbirds) which is approximately 1000 lower in altitude. He miscalculated his approach, thinking he was higher than he was in relation to Mountain Home's runway. He bailed out with seconds to spare.