I tried the 6 minute power nap...it was awesome....I was jumping around full of energy...and then after 2 hours I tried the 10 min power nap....now I'm feeling really sleepy...I don't even feel like waking up. Will this be harmful for my ears?
Just keep the volume down. :) 
Power naps are most effective when taken between 12 and 4 PM. Only take multiple naps if you had a REALLY lousy sleep the night before...
thinkfeelsolve