Imagine you're trying to squeeze into a packed subway car during rush hour - that's basically what steric strain is. It's when atoms or groups of atoms are too close for comfort, causing a major traffic jam. This leads to a buildup of energy, making the molecule go from chill to totally stressed out!
On the other hand, torsional strain is like trying to do a killer dance move in a crowded room. It's when atoms or groups of atoms are trying to rotate or twist, but there's not enough space - talk about a molecular meltdown! As a result, the molecule gets all tangled up and frustrated.
