even an old hand can flub it...
Was in a rush this morning, noticed that the CL was on frame 35 of 36 and thought, "i'll pull the film and have it processed." Popped the camera out of the half case, popped the latch and ... uh ... forgot to rewind the film. Slapped the back on again, rewound, and took it out.
I haven't made that mistake in 25 years. Makes me feel like a kid again.
Had the film processed and there are plenty of useable negatives. Just the last four photos (the important ones, of course) were blasted. Such it is.