he hit the jump and got about 20 feet of air before landing. >> next, it's shanna's turn. >> go, shannan i started going down the hill, i really wanted to stay on top of the tube. i figured that as long as i have it underneath me i'd have cushion and i'd be okay. as soon as i hit the jump, i began leaning back way too far. as soon as that happened and the tube came out from underneath me, i knew that i was going to have a problem. >> shanna loses control of her position and falls on her neck with the rest of her body following right behind. >> when i hit the ground, my upper thighs actually connected with my shoulders when i felt this big smack of just my entire body collapsing in on itself. and it was really painful. >> the impact is tremendous. shanna lies motionless on the ground, terrified that she may be seriously injured. >> i was fairly immobile. i could move my limbs but i couldn't sit up. the pain only got worse. i knew i wasn't getting better. i realized i'm going to need some help. >> shanna's friends call an ambulance and she's immediately taken to the hospital. >> i was con

. >> and shanna are gonna push you back and forth. >> jimmy: okay. >> all right?netic field, right? >> jimmy: uh-huh. >> that's causing the copper to become an electromagnet. >> jimmy: okay. >> and that magnetic field from the copper is polarizing against the hover engine creating that sort of hover. >> jimmy: i wanna get off. >> okay, you can get off. [ laughter ] all right, all right. all right. >> jimmy: thank you. >> you've rescued hill valley! good job! >> jimmy: thank you. okay. i gotta call doc. kyle, hurry up with the thing! >> all right. all right. and step off. >> jimmy: that's fantastic. >> and now you've been on a a hoverboard. [ cheers and applause ] ♪ >> jimmy: i just hovered. thanks, buddy. thank you. >> thank you, guys. thank you. >> jimmy: wow, wow, wow. wow, that felt weird. that was wild. >> it was pretty good. it was pretty good. >> jimmy: all right. >> and it didn't blow up. >> jimmy: i didn't blow -- yeah. >> all right. >> jimmy: but something's about to explode here. >> something is, yeah, yeah. so i brought some alka-seltzer. >> jimmy: oh,

shanna bream reports live tonight from washington. >> reporter: justice kennedy was once again the key vote in a critical case. this time siding with the liberal wing of the court to strike down portions of a texas law the authors say was meant to safeguard the health of women seeking abortions. critics said that was just a sham and that the real motivation was to shut down the majority of clinics in texas. they argued that women in that state would be left with few options, likely being forced to drive hundreds of miles to get to a doctor or clinic who could comply with the standards. in striking down the regulations, justice breyer expressed real doubt they would actually benefit women's health. with justice ginsberg writing in a concurring opinion that it is, quote, beyond rational belief that the law would genuinely protect women undergoing an abortion. the dissenters said the court bent over back wards to get to that result. thomas writing that the court actually reworked the rules, benefiting, quote, judicially created rights like abortion while disfavoring many of the rights act