While the steel chair spot was planned, Guevara busted Hardy open because he accidentally used the wrong chair.
Guevara reportedly grabbed the wrong chair sitting at ringside, according to Bryan Alvarez on Wrestling Observer Live. There were apparently two chairs at ringside, and one was traditional folding chair. The idea was that Guevara would grab that chair and throw it at Hardy, but Hardy would get his arms up to take the impact. The spot was supposed to be a chair shot, but with no blood.
However, Guevara reportedly got caught up "in the heat of the moment" and was very excited. He was unable to find the folding chair, so he picked up the other, heavier chair. Alvarez noted that Guevara panicked and threw the chair at Hardy, busting him open the hardway.
Guevara reportedly had backstage heat over the incident as there were a number of people in the company who were upset, according to Wrestling Observer Radio. It was noted that Guevara received a "very stern talking-to" when he returned backstage.
As seen below, Hardy has had several choice words for Guevara on Twitter today. He also thanked Dr. Sampson and the AEW medical team for fixing him up. Matt's wife Reby Hardy also lashed out on Twitter, and posted a video of Matt's stitches being removed.
You can see Matt's related tweets below, including a response to Tommy Dreamer and several fans:
A dumbass goof— The #MULTIFARIOUS Matthew Hardy (@MATTHARDYBRAND) August 6, 2020
INFURIATING pic.twitter.com/SLAz94IJ5X— The #MULTIFARIOUS Matthew Hardy (@MATTHARDYBRAND) August 6, 2020
I'm gonna destroy that b---h and then my b---h will destroy that b---h too. https://t.co/NPZt8drmEI— The #MULTIFARIOUS Matthew Hardy (@MATTHARDYBRAND) August 6, 2020
You cocky, weird, reckless little piece of s--t..— The #MULTIFARIOUS Matthew Hardy (@MATTHARDYBRAND) August 6, 2020
YOU'RE DEAD pic.twitter.com/SLAz94IJ5X
Yes, Drew, I said "BUMP BOY." FO, you s--t-stirring, desperate troll. Not in the mood for INTERNET NOBODIES after tonight.— The #MULTIFARIOUS Matthew Hardy (@MATTHARDYBRAND) August 6, 2020
f--kin dumbass— Reby Hardy (@RebyHardy) August 6, 2020