Heavy objects, on average, are denser at human scales. Dense objects tend to have an aerodynamic profile compared to sheets of leaves or cloth or sand. They tend to get blown away in the wind. Anything that would bind or compact those lightweight things together like resin or water tends to weigh a sizable percentage of the compound. There is a correlation between heavy and fall speed. It took accurate scales and ~0 bar vacuums to prove it was the air doing it.
Try explaining how a helium balloon works without sounding like a wizard.
Putin shared a tearful memory of the times they shared on the website formerly known as Twitter, just minutes before he was found dead after exiting a window fifteen stories high.