...in my garage. ;-)
Turns out it was a problem with the remote control that was hooked to the visor in my car. There's a little metal thing inside it that sends the signal to the opener when it's pressed down. Since the opener & remote are so darn old, the metal thing isn't as "springy" as it used to be. The garage door guy bent the little metal thing and put the remote back together and now all is well.