Superman never knows what kind of strange effect red kryptonite will have on him, so a lot of hijinks ensue when he is exposed to it. Here are eight of the weirdest transformations Superman has undergone due to red kryptonite exposure (thank goodness they were only temporary).
1 His hair and nails grew uncontrollably. (Superman #139)
2 Flames shot out of his mouth. (Action Comics #283)
3 He was turned into an infant with the mind of an adult. (Action Comics #284)
4 He was given the head and antennae of a giant ant. (Action Comics #296)
5 He was driven insane. (Superman #163)
6 He morphed into a giant Kryptonian creature known as Drang. (Action Comics #303)
7 His face became a sort of mood ring: it started to change colors depending on his emotions. (Action Comics #317)
8 His wishes came true. (Action Comics #283) Aww, well at least this one makes up for the whole shooting-flames thing.