A baby is saved from dying by being put in a microwave but is unharmed. However, this has unfortunate parallels to the real allegations that Ezra Miller put a bullet in a baby’s mouth at one point.
After going on a frenzy, the flash's clothes burn through and he is naked. As a result from losing all his energy he passes out. In addition, Supergirl is passed out when they find her.
MAJOR SPOILER:
Batman 89 dies twice sacrificing himself to the kryptonian army , sasha also sacrifices herself, and Barry 2 sacrifices himself via suicide when he realizes that it is canon event and cannot be changed
*somewhat of a spoiler* in the Siberia scene when The Flash moves a person out of the line of fire, there's two instances of projectile vomit as they react to being moved so quickly. There's no lingering evidence of it after the fact, but the two instances are separated by a fight scene.
Barry 2 goes on a test ride using his powers and accidentally burns all of his clothes off. He later accidentally phases through the floor and freaks out his neighbour.