intrigued by jumping, but i'm so scared to accidentally fall on top of someone

[xXSufferingXx]

i have had many hypothetical ideas to combat this.
like bringing a whistle to bring attention to yourself, so any potential people can get out your way.
if someone hypothetically jumped, it would be best at some abandoned tall building, far away from people.
what else can you possibly do besides the whistle thing?

i guess hypothetically such an abandoned building can also be used as a good spot for full suspension hanging.