Don't bring a knife to a mop fight.

Further proof that mindset, and willingness to fight back are(sometimes) more important than the weapon at hand.

Bellingham clerk with mop fights off armed robber

Hopefully, they can use the surveillance camera footage to track the dude down. 

Read more here: http://www.bellinghamherald.com/2012/03/20/2445816/bellingham-clerk-with-mop-fights.html#storylink=cpy