I have heard about this before but never done it. I'm totally gonna give it a try with my newest PC.
Not the most outstanding first impression for the Dovahkiin to make on the Greybeards, though...
Arngeir: "Well, brothers, we've done our duty and summoned the Dovahkiin. Surely Akatosh has sent us a great hero, perhaps the greatest hero Skyrim's ever known... one who is brave and strong and a worthy student of our esteemed and holy Way. I have no doubt that--"
Dovahkiin: *runs screaming into High Hrothgar*
"There's a troll! A TROLL IN THE MONASTERY!! For the love of Ysmir, KILL IT KILL IT KILL IT KILL IT.... oh gods we're so dead..."
Arngeir: *facepalm*