The Ecuador international fired the ball in from 25 yards out early in the second half of the team's 2-2 draw a the KC Stadium.
The midfielder told Sky Sports News: "We see Enner Valencia do that in training all the time, he has no back-lift but gets incredible power. I did not even see that go in today. I think we showed tonight we are back on our game."
The result leaves West Ham 13th in the Premier League table.