The US F-15 pilot shot down by Iran in April has a very strange supernatural story about his flight.

Before safely ejecting, he claims he saw a cluster of Iranian drones moving in sync, maintaining a jellyfish-like shape.

'Multiple drones interconnected and moving as one with smaller drones below the bigger drones like legs,' a source told CNN of the pilot's account. 'Real alien s***.'

The pilot was extracted from a remote, mountainous region of Iran after a dramatic rescue operation. He hiked a reported 70 miles over 36 hours in Iranian territory before being rescued. 

It was an all-hands-on-deck operation that employed 155 aircraft - including 64 fighter jets, 48 refueling tankers, 13 rescue aircraft, and three helicopters. 

There is no consensus within the intelligence community on how the F-15 was shot down.

Officials were unsure how to evaluate the pilot's report, as a concussion sustained in the crash may have affected his recollection.

Shockingly, the April incident was the second time this pilot was shot down during the Iran war, CNN also reported. 

He was one of the pilots downed by Kuwaiti friendly fire at the beginning of March.

After the CIA located the pilot and began feeding the Iranians false information that the pilot had been rescued, US special forces made a rescue.

The rescue party was forced to leave behind multiple aircraft, destroying them before flying to safety. 

A group of drones moving in formation, as the pilot reportedly saw, is called 'one-to-many meshed networking,' which can allow one operator to guide multiple drones at once.

Russia and China are believed to have this capability, but Iran was not previously assessed as having the technology to achieve meshed networking. 

Trump lauded 'a breathtaking show of skill and precision, lethality and force' as US forces swooped into mountainous terrain in southern Iran to rescue the weapons systems officer (WSO) whose F-15E fighter jet went down on Good Friday. 

'He scaled cliff faces, bleeding rather profusely, contacted his platoon, treated his own wounds and contacted American forces,' Trump said of the still unidentified officer, who was rescued on Easter Sunday.