As well as dealing with the heat of Abu Dhabi, the stars had to look out for poisonous camel spiders that still haunt their dreams.

"Camel spiders suck your flesh and you don't know they're there," Daisy tells U.S. talk show host Ellen DeGeneres.

"They also hide in the shade of your shadow...," Boyega adds. "I was so scared that if a camel spider was in my Stormtrooper suit I would never know. And that would be horrific."

The two actors also had to watch out for killer scorpions, and both admit they're still traumatised from the fear of creepy-crawlies.

John jokes, "I take therapy with Daisy."