Conjugating verbs that end with a c seems to problematic for a lot of people, and one word in particular seems to cause trouble. So, as a public service, I offer a quick spelling lesson. 
You must add a k before adding the -ed or -ing.
Picnic - picnicked, picnicking
Mimic - mimicked, mimicking
Traffic - trafficked, trafficking
Panic - panicked, panicking
You may apply this rule to any other word that matches this form. And I think you can figure out which specific one I mean.

You must add a k before adding the -ed or -ing.
Picnic - picnicked, picnicking
Mimic - mimicked, mimicking
Traffic - trafficked, trafficking
Panic - panicked, panicking
You may apply this rule to any other word that matches this form. And I think you can figure out which specific one I mean.