Quick answer: On Good Mythical Morning, Rhett & Link tested a TENS pain-relief pen during the episode "Are These New Products Worth It?" According to the clip's description, one reaction summed it up: "It's a good pain."
Also known as / Real names: Rhett James McLaughlin (Wikipedia); Charles Lincoln "Link" Neal III (Wikipedia) (Smithsonian National Museum of American History) (Forbes)
Video: This Pen ZAPS Your Pain Away?! Rhett & Link Try It by Viral Podcast Shorts on YouTube.
What happens in the clip
Good Mythical Morning regularly puts viral gadgets to the test, and this Short features a handheld pen that uses electrical pulses for pain relief. Rhett and Link take turns trying it, and their reactions are the whole show. The line "It's a good pain" captures the odd mix of zap and relief.
What is a TENS device?
TENS stands for transcutaneous electrical nerve stimulation. A TENS unit sends mild electrical currents through the skin, which may reduce the feeling of pain for some people (Cleveland Clinic). Traditional units use sticky pads; pen-style versions deliver the pulse through a tip you press on the sore spot.
Evidence on how well TENS works is mixed and varies by condition. People with pacemakers or other implanted devices, or who are pregnant, should talk to a doctor before using one. This article isn't medical advice.
Who are Rhett & Link?
Rhett & Link are the comedy duo behind Good Mythical Morning, one of YouTube's longest-running daily shows. Rhett McLaughlin and Link Neal met in first grade in North Carolina (Wikipedia) and built the Mythical media brand.
Where to watch the full episode
The Short was posted by Viral Podcast Shorts, crediting Good Mythical Morning and Rhett & Link. Watch "Are These New Products Worth It?" on YouTube.
FAQ
What did Rhett & Link test? A TENS pain-relief pen, on Good Mythical Morning.
Does a TENS pen work? TENS may ease pain for some people, but results vary. Check with a doctor first, especially if you have an implanted device.
What are Rhett and Link's full names? Rhett James McLaughlin and Charles Lincoln Neal III, according to Smithsonian National Museum of American History, Forbes and Wikipedia.