here's my take on it ... based on real events - one of my friends re kyaa ;)

2007 - came to the US on F-1 for MS
2009- H-1B filed and denied
2009 - enrolled in another MS program, but visa had expired
2009 - bad luck kharab -DUI followed by DWI - Parole Oficer and AA Classes
2010 - To Nepal to get visa stamped
2010- Administrative Processing started - lasted 3 months-medical check - psychological check - alcohal abuse tests etc Pain ful
2011- Embassy denied visa
2011 - Got a new I-20 from the school- paid a semester fee upfront - reappeared for visa
2011- again administrative proces
2011- had the university directly contact embassy
2011 - reinterviewed, course details asked, DUI and DWI issues asked in details and then told to wait
2011 - finally issued visa after 1 month
2012- came to USA again

moral of the story - always have a designate driver