In 2015, a father saved his son's life when doctors wrongly declared him brain-dead and were taking him off life support. He barricaded himself with a gun in the hospital and had a stand-off with SWAT until his son squeezed his hand. The son made a full recovery.

source: https://www.washingtonpost.com/news/morning-mix/wp/2015/12/23/texas-man-says-he-went-to-jail-for-swat-standoff-that-saved-sons-life/