Falling of a building
First of all, 5 stories are verry much survivable. Not likely, but possible. I mean, there were people surviving skyscraper suicide jumps by landing on a car legs first. The legs and hips were mush, but the car roof in combination with their legs reduced the decelaration enough to allow the important stuff to survive.
And both mains supplies are survivable, it depends on the path the elctricity takes through your body.
If it goes around your heart and core muscles, for example once across your hand, there can be heavy damage to your hand, and your body certanly will not be comfortable, but death for a healthy adult is unlikely.
I had a small mains shock from a faulty range hood once; I went to switch it off, and while switching, I touched the metal housing. Something shorted, the case became life, my hand jolted back and the RCD tripped. I had a nice big burned spot on my finger, my hand hurt as hell, but otherwise, I was fine (though incredibly startled).
Would the path of electricity been through my body to ground, big difference.
Same with lightning strikes onto people: Even direct hits ar verry much survivable, though at tens of thousands of amps and hundreds of thousands of volts, that should be impossible.
For example, if the bolt strikes your right shoulder, and your right hand is conductivley coupled to ground (for example a street sign) and you are wearing thick rubber sole boots, the majority of the power will go the way of least resitence, through your arm and out the hand.
Severe burns and nerve damage on your arm, but survivable.
If you'd have your left hand grounded in that scenario, the current would pass through your chest, messing up heart and breathing, resulting in verry likel death.
That is why power lines are that deadly: Most of the time, the path to ground is through your entire body.