Like many things in life, when creating a movie it's important to start off on the right foot.
If you stick the landing, fans will happily buckle up for the rest of the exciting ride to come. However, if you c*ck up the opening to your feature then there's a good chance you'll be fighting an uphill battle with spectators for the next two hours or so.
What turns a fairly mediocre first scene into a truly mesmerising one, though?
Well, more often that not, completely shocking an audience by giving them a moment or exchange they definitely weren't expecting so early in the film tends to do the trick and shatters any other expectations they had for the experience as a whole going in.
Killing off seemingly vital characters within minutes, instantly throwing the main antagonist into a blistering action sequence or even just the sight of visual effects which didn't even seem possible at the time, have all well and truly caught audiences entirely off-guard over the years.
So prepare to pick your jaw back up off the floor as we take a look at ten films which set the tone for things to come in the most stunning way imaginable... and yes, there will be spoilers.