its amazing what they can take- On one of my soil grows I actually snapped the main stalk. I just wrapped it up in duct tape and hoped for the best, she was set back a few days but the shock didnt herm her or anything. It may be worth keeping an eye on it- shocks when they are young can lead to herming and then you may end up with seedy weed. not necessarily a bad thing considering this is meant to be the year of the guerilla grow!
**edit** Oh my god I think I jinxed myself! I was doing some work on my scrog just now and put too much pressure on one of the main branches and cracked it right at the stalk. I got a cable tie holding it together atm. hope it'll be ok, pics to appear on my grow in a few mins. what an absolute twat I am! lol!