A lot of vehicles are what we call, drive by wire, there is no mechanical connection between gas pedal and the throttle being opened, it is possible, but very unlikely that ( unintended ) acceleration could occur, but there are many failsafes built in, the number one, is the brake pedal, if it is depressed, it cancels the throttle position, even if you were pressing the gas pedal and the brake pedal at the same time. The electronic throttle go's to the closed position. Anything can happen, but this technology has so many redundant systems built in, it is very unlikely.
The same thing happened in the 90's with Audi, it just was not true, a lot of people cashing in on the unintended acceleration, band wagon, I was an expert witness on 1 trial, the situation could never be duplicated...I had to evaluate a vehicle that ran over a patron in a car wash, it was slippery shoes on the gas/brake pedal, IMHO.
I have been doing this too long to rule it out, as electronics could be susceptible to radio frequency interference, but it is very doubtful, with the number of instances, reported, but, no repeatability, and a willing congress, to point fingers, but have no solutions.
Can't say no, it is impossible, but in my experience, just like the lady who spilled hot coffee in her lap, Pilot error, not mechanical or electrical.