Work-in-progress previz. This is what I mean by "ride animation". No Sound.

This is only the acceleration couches and Sergei. I don't have a rig to connect the characters to the seats, so I just animate their "Torso" bone to match the seats' movement.

There are many more sophisticated ways I could've done this, like using noise generators. But I just did this by hand. I kind of like the rougher oscillation this produces, anyway, and it requires less setup. There are two loops: a low frequency base oscillation with a period of about 40 frames and a high frequency oscillation closer to 7 frames, using the "Add" operator in the NLA strip.