What happens to the dead in Christ and to living believers when the trumpet sounds?
When the trumpet sounds, the dead in Christ are suddenly resurrected, and living believers who remain are changed. This change is instantaneous, a split-second metamorphosis from the old body of flesh to a new glorious resurrected body, because believers cannot go to heaven in this old body.
Les teaches that when the trumpet sounds, the dead in Christ will be suddenly resurrected, and those who are alive and remain—if it happens while they are still alive—will be changed. He explains that believers cannot go to heaven in this old body, so there must be a real, fast metamorphosis. Using the caterpillar and butterfly illustration, he qualifies that while that process takes time, this change will be instantaneous. Les points to I Thessalonians chapter 4, noting there is no language of cataclysmic events or God's wrath being poured out; it is simply sudden: we will be gone.