International Space Station photo

A gorilla got loose on the International Space Station, escaping from its containment unit and chasing after astronaut Tim Peake. At least, that’s what it looks like.

Mark Kelly, brother of fellow astronaut Scott Kelly posted the short and fun video on Twitter earlier today, showing the gorilla’s hijinks set to the tune of Yakety Sax.

Mark Kelly couldn’t resist ribbing his twin brother, who is about to complete his year-long stay on the International Space Station. Tech Insider reports that the gorilla suit was a gift from Mark to Scott, part of a care package sent to the space station during one of the re-supply missions to the space station.

Scott Kelly later posted a different, slightly longer version to his own Twitter account: