I had a similar (but not deadly experience) with my husband but luckily I waited to identify the target. You can read the story in my blog - I won't post the long thing here.
Shorts, he usually calls out "Honey I'm home" but I failed to hear him until he was already going about his business assuming I'd heard him. Happened again this morning, but I paused long enough to hear him start changing the laundry this time.