During CNN’s town hall with Democratic candidates on the climate “crisis” on Wednesday, viewers noticed something unusual about former vice president Joe Biden: his left eye was bloody.

Uh, hey guys. Joe Biden’s eye filled with blood while onstage at the CNN town hall.

This is not a photoshop: pic.twitter.com/kJRHxMP8wc — Benny (@bennyjohnson) September 5, 2019

It was even at the top of the Drudge Report.

A burst blood vessel in the eye was not the only reason people were talking about Biden on Wednesday, however. Many took aim at his performance, which was full of vague responses intermixed with incoherent statements.

.@JoeBiden's answer on fracking was a rambling incoherent mess. Honestly, the more he talks, the more it is clear he is declining cognitively rapidly. It's irresponsible of the Democratic Party and media to pretend these are "gaffes." He is not well #ClimateTownHall — Jordan (@JordanChariton) September 5, 2019

Joe Biden is really struggs to func at this climate town hall — Annie Shields (@anastasiakeeley) September 5, 2019

Guy's seriously, Joe is just...saying nothing. This is so strange. #ClimateTownHall — Kira (@RealKiraDavis) September 5, 2019

Joe Biden’s entire political persona these days is just loudly and emphatically asking “what the hell are we doing here?!” and “what’s going on?!!” with zero solutions. #ClimateTownHall — Emma Vigeland (@EmmaVigeland) September 5, 2019

Absolutely the best 30 seconds of the CNN Climate town hall.

A must watch.

So beautiful.

This is art.

Never change, Joepic.twitter.com/n5CYwlinnq — Benny (@bennyjohnson) September 5, 2019

It's time for Biden to hang it up pic.twitter.com/iv8bmjVqaQ — Ryan Saavedra (@RealSaavedra) September 5, 2019

It's time for Biden to hang it up pic.twitter.com/iv8bmjVqaQ — Ryan Saavedra (@RealSaavedra) September 5, 2019