The stunt driver who'd trained extensively to do the jump suddenly wasn't available. Another driver, "Bumps" Willard, happened to be on set, simply volunteered to perform the stunt and did it flawlessly on the first take. As soon as the shot was completed, Cubby Broccoli rushed up to him and slapped a roll of hundred dollar bills into his hand out of gratitude and Willard asked if he could try again!
The shoot-out in Scaramanga's funhouse during the pre-credits sequence is a very good showcase of Scaramanga's skills and intelligence as an assassin, particularly:
The moment were he picks up a bottle and throws it to distract the gangster sent to kill him. During the distraction, Scaramanga jumps towards a cabinet filled with pistols, but Nick Nack says over the intercom that the door is locked to prevent the kill from being too easy, so he has to look elsewhere.
Pushing a button so he could slide down the staircase leading to the pedestal holding his Golden Gun, do an evasive combat roll, grabbing the Golden Gun and perfectly fire a lethal shot into the gangster.
Bond managing to hide from the funhouse cameras and get disguised as a figure of himself to shoot Scaramanga.
Bond coldly gives his moral viewpoint on killing to Scaramanga: "When I kill it's on the express orders of my government, and those I kill are, themselves, killers."