While the previous four deaths seem pretty irreversible, the remaining deaths are a bit more up in the air. As you know, once Thanos gets all six Infinity Stones, he can basically destroy half the universe with the snap of his fingers. Literally. Once he steals the final stone, Vision's Mind Stone, he does exactly that. With this snap, half of the population of the entire universe simply ceases to exist. And so we watch as many of our beloved characters turn to dust. Bucky is the first to leave after the snap.