Throttle is stuck, it is electric

There are a couple reasons it could stick. One would be that carbon has built up in it enough that the throttle blade is sticking. That can be removed using throttle body cleaner and some small brushes to scrub the bore clean. Another reason may be that the throttle controller on the throttle body is starting to fail, usually this will set a code but not all the time. If you have access to a scan tool that has bi-directional control you can test for codes as well as use it to verify that the throttle body and the throttle position assembly in the car is operating correctly. Also check that a floor mat or anything else is not moving around and causing the pedal to stick.