Dozed Off

I had an appointment yesterday noon at 2.30pm. This guy was here to introduce a software. I was having a bit of difficulty listening to him, as it is like he is bitting his lips while talking - words can't be pronounced correctly. I have to guess the words he was trying to say. 

Something happened half way when he was busy talking - I dozed off !!! He saw it & asked me whether I'm sleepy. Hmm..  that was obvious what, why still asking me that. Somehow, I felt funny of what happened. I did try hard not to dozed off by pinching my leg, scratching my arms, holding from yawning, but that just doesn't work.