Except she wasn't about to jump. Her thoughts tell you she wasn't. Its was still kinda over the top yes but im pretty sure she wouldn't have. She was panicking and running not really suicidal (see earlier comments)
Why did she go to the top of the building, to enjoy the nice view? Regardless if she had suicidal intentions from the beginning, she could have died if she had slipped. It was extremely dangerous especially since she wasn't in the right frame of mind.
Also the first place one would think to run, to get away from the person they want to avoid won't be the edge of a building would it?