Family 'storm' McDonald's and knock manager unconscious over burger complaint
![Family 'storm' McDonald's and knock manager unconscious over burger complaint](https://i2-prod.mirror.co.uk/incoming/article33235813.ece/ALTERNATES/s615/0_SWEP_JE_HuwJomesJPG.jpg)
Customers fled the fast-food restaurant as trays, stools, bags of food and fists flew around, with some junior staff members having to escape through the drive-thru window