But while Superman was holding the cyborg’s left hand and telling
Jimmy to run away, Metallo balled the fingers on his right hand into a fist
and smashed it into Superman’s back. WHAM!
“Unnggh!” Superman grunted, knocked down by the unexpected sucker
punch. From the ground, he countered Metallo’s attack with his heat vision,
shooting red-hot beams straight from his eyes at the cyborg’s core, hoping
to drive him off.
“Your heat vision cannot harm me, metahuman,” Metallo scoffed. “My
designers made me impervious to blasts that are far hotter than yours!”
Putting the palm of his hand directly in the laserlike stream of heat, he
reflected the beams back at Superman. Luckily, Superman was unharmed
by his own heat blasts.

Chapter 9