Accelerator 
An accelerator, gas pedal, or throttle on a boat/airplane, can imply that you have the ability to attain a goal without the assistance of others. However, if the accelerator is jammed or broken and you lost control of it, the dream may be cautioning you against acquiring an addiction or dependency that may have a negative influence on your life.
Bottomless Pit
If you dream of a bottomless pit, you are feeling hopelessness and despair in your waking life. The bottomless pit may be indirectly referring to your conclusion and acceptance that an issue has overcome you and is never-ending.