A TikTok dance video has gone viral after a strange – and pretty eerie detail was spotted in the background.

TikTok user @reubix_cube shared a video of himself attempting a TikTok dance to Doja Cat’s ‘Say So’.

He said: “Lmao I’m home alone so I learned a TikTok dance.

“Love you Doja but what has my life come to?”

But many people found they weren’t watching the dance moves – having clocked a strange detail on the staircase in the background.

If you look closely around four seconds in to the clip above, you should see something – or someone – appear at the top of the stairs.

One person commented to ask: “DID Y’ALL SEE THAT?? IN THE BACKGROUND?”

@reubix_cube then replied asking: “What am I supposed to be seeing?”

Many people then responded to say they’d spotted something poking its head out from the top of his staircase – whether they thought it was a cat, a person or something altogether more supernatural

One follower commented: “The AMOUNT OF ANXIETY I have from this video. That’s someone literally poking their head TO LOOK AT YOU.”

Some people speculated that the video may have been staged, finding it a bit suspect that he had specified he was home alone – with one person saying: “OK so the fact that he had to post ‘I’m home alone’ and doing this oldish dance really makes me feel like it’s all staged.”

However, others grew more concerned, prompting @reubix_cube to post an update.

Saying he is ‘alive and safe’, @reubix_cube wrote: “Thank you to everyone who was concerned. I’m kind stomach sick rn and I was in and out of sleep all of last night.

“It’s weird to have so much attention on me right now but I have been reading some comments and I’ll address questions later on today.”

Telling followers to ask questions under the TikTok post, @reubix_cube said he could answer any queries at a later time.

He added: “It’s 6am in my corner of the world and I need to catch up on some sleep.

“Sorry if I worried you guys.”