Windshields are designed to be strong but not indestructible; avoid putting undue pressure on them by leaning against

https://spark-wiki.win/index.php/Professional_vs_DIY:_Evaluating_the_Risks_of_Self-Performed_Windshield_Repairs

Windshields are designed to be strong but not indestructible; avoid putting undue pressure on them by leaning against them when entering or exiting the vehicle to prevent cracks