PS4 Resident Evil 5 Mercenaries United solo Mine Barry 150 kills

continue with my 150 kills challenge. this one took me over 2 weeks of trying, don't know why? head butt melee limits only 1 kill per hit. so i have to resort to burton foot trying to get multiple melee kills. anyway, try to get the game starts in the upper level where you can take out the chicken first. i started this one at the lower level and got lucky. i was able to make up those precious few seconds by knocking out most of the giant majinis with 2 broken butterflies.