Though live in China, I had seen the news in 1986 about the tragic explosion of the US space shuttle Challenger, which caused 7 people to die. When the autobots spaceship XanThium was (apparently) destroyed by Starscream, the explosion scene seriously reminds me of that accident in 1986. I told my feeling to my transformers friends, but most of them were too young that year to have that memory. Not sure if this is what the movie intended to remind us. Since it already reminds us of Appolo's moon landing and Chermobly's nuclear disastor.