Front seat stuck to the front

2002 Toyota Camry XLE, 46,000 miles, 2.4L 4cyl

I went through the car wash, and they moved the passenger seat all the way forward when they cleaned the interior. After driving away, I found that it is stuck fully forward and won't move back at all. Other power seat functions are normal (up/down/recline, etc.) Only the movement forward/backward is affected. When the switch is pushed I can hear and feel the motor trying to move the seat but there is no movement. I've also tried sitting in the seat and pushing with my legs when activating the switch - no luck there either. Is there a safety latch or something that may be engaged?