These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Nightmare Fuel: Qin Shi Huangdi's corpse coming to life after Indy removes the Heart of the Dragon out of his mouth, and speaking in creepy Chinese can create nightmares for a lot of people, especially the close-up zoom-out from the emperor's face (with his eyes rolled all the way back). Also his maniacal Evil Laugh. Oooh......
That One Level: The drill-tank level. It's a chase sequence from the tank's point of view with Indy jumping over pits. Eventually, whip swings get added to the mix. This, in and of itself, isn't too bad. However, at about the halfway point, two whip swing pits in a row start appearing, with barely any space between them. They require near-perfect timing for you to both release the whip from the first and to jump out over the second. The tank also has a claw that will occasionally obstruct your vision of where you're supposed to be running, if only mildly. Seeing Von Beck and his tank go hurtling into a bottomless pit at the end is very much worth it.