Minnetonka student's Snapchat gun pic 'not a threat,' but a 'very poor joke'
The school district says there's no threat.
Police trying to ID 'idiot' who scaled water tower, put it on Snapchat
The Dodge County Sheriff's Office shared a screenshot of the climber.
How a single celebrity tweet cost Snapchat $1.3 billion
It caused a panic among Snapchat investors.