Another day, another Donald Trump getting off a plane sighting. On Monday, September 23, while on his way to Pennsylvania, the ex-president, 78, was seen doing his usual schtick. “Trump with his signature wave to nobody again today in PA. Still no Melania,” Trump critic Ron Filipkowski captioned a video on X, formerly known as Twitter. In the clip, the politician stops to wave to no one as he puts his fist in the air. Additionally, Trump’s wife, Melania Trump, didn’t appear to be with him, as usual. Of course, people thought the outing was hilarious. One person wrote, “Is he shaking hands with…