He then developed crushingly painful headaches and at one point he chose to go to the emergency room.
The man went straight home from the competition, but he was still suffering from a headache and it was "excruciating", so he went to the emergency room.
The man, who has not been identified, immediately began dry heaving after sampling the chilli, the USA authors said.
After a raft of tests, a scan showed that several arteries in his brain had constricted, and doctors diagnosed him with "thunderclap headache secondary to reversible cerebral vasoconstriction syndrome (RCVS)".
This is the first time it is reported that eating chili (such as- Carolina Reaper) can cause thunderclap headaches.
Although a situation like this is rare and possibly the first to be documented, it is important to note that it is possible, said Gunasekaran, who co-authored a description of the man's symptoms, diagnosis, treatment and followup that was published Monday in BMJ Case Reports.
Rob Radcliffe previously undertook a challenge to eat a Carolina Reaper. with no such consequences.
And as for the man in the case study, his thunderclap headaches went away on their own. Measurements vary, but a really hot habanero might come in at 500,000 Scoville units.
He had no further thunderclap headaches. A capsicum, the baseline pepper, has one SHU.
Dr. Lawrence C. Newman, a neurologist and director of the headache division at NYU Langone Health, said, "On a 1 to 10 scale, its off the charts".
Now, however, doctors are warning that they could also be damaging their brains.
"Because he could not tolerate the headache, they sent him to the ER", he added.
And his had slightly high blood pressure of 134/69mm Hg.
Now this pepper, billed as the world's hottest, has made it into a medical journal.
But "we are not advising anything against the Carolina Reaper", Gunasekaran said.
Eating enormous hamburgers or entire turduckens might be favourite pursuits for large gentlemen with loud voices and even louder shirts, but true food warriors know that the ultimate contest between humans and comestibles involves eating simple, uncooked, untreated chillies. He has a partnership with a company that produces them. I had another two and it was just overwhelming.