http://diabolotricks.com/Extras.htm#garroteFor those who want an idea about which trick is being talked about.
Basicaly the trick seems to be-
Have the diabolo close to the left hand
Put head between strings
Bring right hand over the head so that the string starts to drape over the back of your neck
Reach under the diabolo (right side)
Scoop/sun/bring right hand up to pull the diabolo over the neck so you end with the diabolo as if you have caught it crosshanded
have a look at the Scoop Catch, Scoop Sun, and the Cross-Arm Toss
http://diabolotricks.com/Overarm.htmpretend the arm is your neck and imagine entering it calmer.