This glimpse behind the scenes of 47 Meters Down also offers insight into how Moore and co-star Claire Holt handled their underwater stunt work. (Which is sure to intensify in the recently announced sequel, which is set to add one more meter of terror. Literally, it is titled 48 Meters Down.)
"There are scenes were Mandy is, like, six meters under, in a mask, having water and blood injected into the mask," director Johannes Roberts explains. "I'm an experienced diver, and I'm not sure I'd do that."
For her part, Moore says of filming underwater, "You want to conserve your energy as much as possible, because when you go for it, ugh...You have to go all out, and then you get to the surface and you're like, 'I feel entirely taxed. I have nothing left to give.'"
If you missed 47 Meters Down, which is available digitally now and arrives on Blu-ray and DVD on Sept. 26, here is the official synopsis:
"Sisters Lisa (Moore) and Kate (Holt) become trapped at the bottom of the ocean when a diving expedition to observe sharks goes horribly wrong. When the cable attaching the cage sinks to the bottom of the ocean, the sisters must figure out a way to get back to safety battling injuries, lack of oxygen, and worst of all, bloodthirsty, great white sharks."