"#SeanSpicer was paid to lie. He is a liar. Let's not chuckle along with him and romanticize his treason," one user writes.
Viewers expressed how they weren't sure if they should hysterically laugh or roll their eyes at the surprise cameo.
"What fun to watch @seanspicer having a sense of humor about all the times he lied to the American public! GOOD SPORT! #emmys," one user wrote.
Here's what else Twitter had to say:
SEAN SPICER DOES NOT GET TO BE FUNNY— Ira Madison III (@ira) September 18, 2017
The degree to which Sean Spicer has faced no consequences is a glimpse into the post-Trump future.— Jamelle Bouie (@jbouie) September 18, 2017
ha ha ha remember how Sean Spicer was a lie-peddling disaster for America— Marc (@MarcSnetiker) September 18, 2017
Sean Spicer gets a recovery tour after lying to the public for months but the first woman nominee is supposed to go into hiding— JeremyConstantinople (@smartflexin) September 18, 2017
As Deray would say, watch whiteness work to normalize Sean Spicer! COME! ON!— roxane gay (@rgay) September 18, 2017
Steve Bannon got a 60 Minutes feature & Sean Spicer got an #Emmys cameo, but Hillary Clinton needs to "shut up & go away"? Mmkay.— Sarah Lerner (@SarahLerner) September 18, 2017
Sean Spicer on the Emmys is the Fallon patting Trump's head of the Emmys— J. Escobedo Shepherd (@jawnita) September 18, 2017
I'm not ready to laugh "with" Sean Spicer. I think he is an evil, opportunistic liar that hurt our country.— Zach Braff (@zachbraff) September 18, 2017
.@seanspicer can normalize himself in good fun, but he still passionately advocated against human rights, health care, & American values— Kal Penn (@kalpenn) September 18, 2017
Hey remember that time when Sean Spicer blatantly lied from behind the White House podium? It's now a punch line...that he is in on!— Matt Viser (@mviser) September 18, 2017
[[__inactive:kaltura-video:0-ekct4e1i__]] **See who won an Emmy Award at this year's show:** **Emmys Red Carpet Fashion: The Bold, The Beautiful And the Boring:** View Photos Getty View Photos Snapchat
Sean Spicer already starting to cash out— Zach Harper (@talkhoops) September 18, 2017