A couple times I just kept fighting and didn't even realize I went out. My partners had to tell me I went out temporarily.
A couple times I just blacked out and couldn't see but I could hear everything and knew what was happening.
A couple times I woke up and was mildly convulsing for a few seconds and was just trying to suck in air.
Only one time I actually woke up with my coach standing over me. I am guessing I was out the longest that time. It really felt waking up from a night of sleep that time.
I was just stubborn and will always keep trying to defend until the very last second. Thankfully, my defense has improved and I haven't gone to sleep for a few years. I also have less ego now and will probably tap sooner in the training room these days. It's kinda stupid to let yourself go out I practice. (Conpetition is different story) Sometimes it's better to just tap and nobody notices. It's way more embarrassing for everyone to see you went unconscious.