"The left side of Mr. Sir’s face had swollen to the size of half a cantaloupe"
Cantaloupes
Creative Commons Attribution Share AlikeCantaloupes - Credit: Toby Hudson / Wikimedia Commons

The swelling in Mr. Sir’s face is due to the rattlesnake venom, which causes swelling and excruciating pain.

 

A cantaloupe is an orange-fleshed sweet melon.