pearlmomma 
2004 Toyota Matrix Wagon XR Fwd 4dr Wagon (1.8L 4cyl 5M)
Breaking in car - new discoveries 
 Bought Matrix new. Have 21,000 mi on car today. Mostly city driving with occasional road trip. Beginning to see minor degradation on interior moving parts - the "cheap" is revealing itself. Out-of-control acceleration happened to me 2 times. The accelerator just slams to the floorboard and won't let up. The first time in 70+ mph traffic - the second time 45+ traffic. Terrified me. Panic! Had to yank emergency handle and turn car off. It is a real experience and the dealer can't explain. I think it's a defective chip in the master brain of some cars.