Newcastle have beaten Chelsea and Tottenham in the past week.
When it comes to the reason for the turnaround in fortunes, for Williamson it's simple.
"It's a reaction," he told nufc.co.uk.
"The supporters were obviously upset by it and, I can't speak for anyone else, but for me it was one of the worst defeats of my career.
"I can't stand losing those games that mean so much. I hate it.
"We have two clean sheets and two wins now against two difficult teams, so everyone is very happy. We knew we were capable of it"
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball