This is the 9830th most frequent Turkish word.
atmasına
"Atmasına" means "to its throwing" or "to its tossing" in English, depending on the context.
Here, 'atmasına' is used in a subordinate clause indicating the action of 'throwing' performed by Ahmet.
Ahmet topu atmasına rağmen gol olmadı.
Although Ahmet threw the ball, it didn't result in a goal.
In this context, 'atmasına' refers to the action of 'falling down' executed by the key as an inanimate subject.
Anahtarın yere atmasına çok şaşırdım.
I was very surprised that the key fell to the ground.
Here, 'atmasına' connects the action of 'throwing' with the guests as the subject within a compound sentence.