automatic doors.......

When you in a shop or an office building the chances are that you will at some point have to pass through automatic doors. Is it not annoying that as you approach they are already open (someone else having just passed through) but as you pass through they threaten to close or actually close? This has happened to me and I find it annoying, embarrassing and stupid. I think having seen someone 'assassinated' by this some years ago on a Bond film it has left me scared and fearful.

Have I got too much time on my hands?

Thanks.