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

https://smart-wiki.win/index.php/The_Environmental_Impact_of_Auto_Glass_Waste_and_Recycling_Options

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.