WASHINGTON — Erin Thielman had just stepped out of the Washington Hilton’s ballroom to make a call to her son when she heard gunshots and witnessed the Secret Service’s dramatic takedown of the White House Correspondents’ Dinner shooter . Thielman, an Air Force veteran who had been one of the Wall Street Journal’s guests alongside her husband, Jason, was standing just on the other side of the security perimeter when alleged suspect Cole Allen attempted to charge through. “As soon as my son answered the phone, I said, ‘Hey, bud,’ and I heard three loud bangs,” she recalled to The Post. “It was gunshots. I looked to my left. I saw Secret Service with their pistols drawn, probably just had shot.” Erin Thielman recalled the moment that Secret Service agents took down suspect Cole Allen. truthsocial/realDonaldTrump “Like right in front of me, he was a foot away,” she said of the suspect, Cole Allen, 31, after Secret Service took him down.…