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

https://remote-wiki.win/index.php/Emergency_Situations:_When_Immediate_Auto_Glass_Replacement_is_Necessary

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.