It’s a common occurrence for Groot to explode in the Guardians of the Galaxy comics, and it only takes a piece of his remains for him to regenerate.
Compare Quill meeting Groot for the Just shapes and beats la danse macabre shirt besides I will buy this first time and asking him if he knew anything else and his reaction when Teen Groot said a swear word in the cockpit of the Milano. Once you get used to Groot’s pronunciation, it stops sounding like “I am Groot” (to you) and sounds more like real dialogue.
