Aside from the standard vehicle mechanic interface, you have access to one control, tied to the keyboard hotkey '6':
This will shoot the rider up and out of the spider-tank and about 20 yards to the rear. The same effect happens when using the "leave vehicle" button on the standard vehicle interface.
See also Edit
- Patch 3.3.5 (2010-06-22): Added.
Event activated September 7/8, 2010