Why It Happened: Texting instead of watching where you're walking.
How It Happened: See video.
Seriously, the lawyer doesn't know how or why?
She said herself she was embarrassed and just hauled tail, hoped no one saw, etc.  Then complains that no one saw.  Pick one.  Love that she says "that coulda been a senior citizen!"... yeah, it could have been a fragile lady you smashed into cuz you weren't paying attention.  It could have been an innocent bystander you tackled and hurt instead of just yourself.  Absolutely right about that honey.  YOU could have done a lot more harm than you did.  As to why security didn't come running.  Just of that particular scene we know they have two cameras... so how many cameras do you think are throughout that mall?  And how many security people are on duty to watch all those screens?  There's no way they have one guard for every single camera... plus extras walking around too.  They depend on people, employees and customers, CALLING them if there is trouble.  This woman, who most definitely knew the number since she worked there, definitely knew the layout, where security is, etc she didn't call.  I'm guessing that after she climbed out, walked around, found a manager, talked to her, got calm etc... then the manager she spoke to called security and they came... 20 minutes probably seems like an eternity when you're soaking wet, but if you're dealing with a hysterical person who isn't speaking right, trying to assess whether she's hurt or okay... etc... you can't just leave her to make a call.  That's my guess about what happened anyways.  We know by her own words that she didn't call, not until the next day, so it was someone else.  Makes sense it was the manager she actually talked to.  
As to holding people responsible for the leak... one employee took it upon themselves to steal mall property (the security tape) and blast it through the air waves.  Why are you trying to hold the mall accountable for a person (or maybe couple people) who STOLE from them?  You want to investigate?  Work WITH the mall to find who it was who stole from them.  THAT is who owes you an apology.  That is who should be prosecuted for theft.  And IMO should be fired.
Grow up.  You tripped over your own feet, people laughed.  You yourself admit it's funny.  Get over it.