Can you fall into a crack from an earthquake?

This is potentially possible. In large earthquakes, especially in areas where there may be underground caverns or water aquifers, the sudden shaking can cause chunks of surface soil to shift and open up a crevice in the ground.

Although such crevices can be large enough to swallow cars and homes, usually the crack's appearance is gradual enough that an alert person would be able to get out of the way before falling in.

It is fairly common for the ground to crack as a result of earthquakes, but normally these cracks are small and just disrupt roads and railways, or split sidewalks. They don't usually become big gaping holes in the ground.

If you do image searches online for earthquake cracks, you can see examples of the most common types.