What the video in the OP inadvertently accomplishes is demonstrating why Bernie Sanders would be infinitely more adept at "holding up against Putin" than Donald Trump.
This week alone Donald Trump, while representing the United States of America on foreign soil, trashed a former U.S. president and praised a former KGB officer. His virulent emotions towards President Obama, and his ego, were prioritized in his indefensibly and extraordinarily unpatriotic conduct, rather than putting allegiance to his country first. Though it's unequivocally not in America's national security interest to offer a gift to Putin considering his chronic cybersecurity attacks on us, with nothing to be received in return for our country, that's what Trump has fervently advocated. All Putin will offer is some cheap flattery that Trump will accept. He pushed Dan Coats, our former director of National Intelligence to resignation due to his repeated prioritization of his ego over the facts presented by our intelligence community.
Bernie's ego is not like a feral cat that must constantly be fed and yet will still wildly lash out. If he did let his ego rule him, he wouldn't take the risk of punching a speed bag on camera, absolutely knowing the probable chance of precisely what we saw happening, while on video. He wouldn't have thrown his head back in delighted laughter, at himself. Growing old is a mandatory part of the gift of longevity, growing up is treated by some as being optional, and one of the first measures of being grown is being able to laugh at yourself; something some are unable to accomplish no matter their age. It's actually a healthy demonstration of mental strength and emotional maturity. You're not going to see Bernie lash out in rage over people on the internet mocking the video. He has more important things to do.
The video, though doctored, is also unintentionally a metaphor for Bernie's style of learning how to roll with the punches. Of course anyone who ever gets into the ring or takes a swing at the speed bag accepts the risk of being hit. In the literal sense it's alluding to a boxer's ability to deflect the full force of an opponent's blow by adroitly moving his body. He maneuvers in such a way not to avoid the punches but to roll with them. It appears less aggressive, weak and foolish even, but it is strategic, relying on wisdom, endurance and skill. It's to wear the opponent down until the best moment to strike back. It takes humility. In the metaphorical sense, it's the ability to adapt to difficulties by accepting them and strategically persevering, in making calculated moves. In contrast, Trump has bragged that when he's "punched" he'll punch back 10 times harder. And he perceives being laughed at as a punch to his ego, instead of having the strength to roll with it and move forward.
