Is it normal to fall asleep like this?

Question

Sometimes when I'm tired and I'm sitting on my couch or recliner I'll fall asleep and I won't even realize I feel asleep until I wake up. Sometimes I drift in and out and I don't even know until somebody says something. Is this normal?

Answer 1

Since you characterized the problem as occurring when you are tired, its entirely normal unless there is no explanation for being tired. 

Answer 2

totally normal if you are tired

Answer 3

I hope it's normal because I do that all the time.  Like when I put eye drops into my eyes I have to close my eyes for about ten seconds to ensure the drops do their job.  Then half an hour later I wake up.  Yep, my ten seconds of eye closure morphed into a short nap in the chair where I do my eye drops.