Pulis revealed he had been practising the routine to catch West Ham off guard and was pleased to see it make an impact.
"We have worked on it for the past three days," he said. "We tried it five or six times and Jonathan Walters has never scored from it so I'm glad he saved it for today.
"I spend a lot of time watching videos and watching teams and I felt if we could do this it would come off. You work on it millions and millions of times - it is lovely when it comes off."