There's an amazing lesson from one of my favorite storytellers, Billy Wilder, and it's only three minutes long. It's really worth watching. I'll link to it at the end. But it's about something called the Lubitsch touch, which is essentially tension that the audience knows. But the characters don't necessarily. It's a really subtle form of tension.
That's brilliant. And it also leaves a lot to the imagination. It doesn't just show you everything. A lot of tension that happens in Lubitsch touch happens implied or it happens behind a closed door. Watch this clip at the end of this, it's really worth watching. There's other forms of that like in Shaun of the Dead when Sean is the only character seemingly in the world who doesn't know that there's Giambi apocalypse happening, and he's even slipping in blood, but he's completely preoccupied with his own life and he's tired and he's hungover, but yet zombies are walking around all around him.
That's tension. It's like when is he going to wake up and realize that his life is actually in danger? Check these out. I'm going to link these in this chapter as well and it's going to be really worth your time to check those out. Learn about the Lubitsch touch