After stop-A dropped you into the monitor, you could boot into single-user mode with >b -s and then, at the sh prompt, as the single (super) user, edit pass

After stop-A dropped you into the monitor, you could boot into single-user mode with >b -s and then, at the sh prompt, as the single (super) user, edit password # ed /etc/passwd to add in a second root account for yourself. That could be pretty helpful.