Northern Minnesota.. pull into state park...ranger tells us that a 400 lbs sow & 2 cubs have been rummaging garbage & opened a tent last night....we're in a popup camper...we go to bed...2am I hear the bear walking outside... thumps the side of our camper...I pull out my knife... a 2" penknife.. all I have... but if the bear rips the fabric I'll fight back... quiet for a while... THUMP again, it hit the side of the trailer.... then quiet... quiet... GROWL... I hear it clearly right outside of our camper...then quiet...quiet... it is 4am and I drift off to an uneasy sleep... at 6am my wife wakes up and I tell her what happened.. she laughed!! Says to my daughter, sleeping at the other end of the camper, to roll over in bed.... She does so...THUMP... It was my daughter rolling over in bed! But.. What about the Growl? Wife laughs again... the man in the camper next to us was snoring.... we still laugh about that today.