henn has a theory. >> the problem in my opinion is the speed. the speed limit is 25 miles per hour.ucks that hit the crash beam go way too fast and if you're driving a rental truck and you are really focused on sort of your immediate environment, if you're not experience, you might very easily miss obvious signs and all of a sudden, boom, get stuck under this bridge. >> while it only takes a matter of seconds for a truck to get stuck, getting unstuck is a completely different story. >> the process of getting the truck out depends on the severity of the crash. some hit the crash beam, back out and drive off and others get stuck and can't get the truck out without help. >> but no matter how destructive the crash is to the trucks and the bridge, all of the drivers henn catches on camera have been able to walk away. >> i don't know anyone who got seriously injured from a crash. they're shaken up. but no serious physical harm. >> as for the 100-year-old bridge things keep rolling along. >> ooh! >>> coming up -- unbelievable stories of survival. two people struck by runaway vehicles live

andrew didn't know who henne youngman was at one point, but one of his greatest lines was can you gett to get a table near a waiter. have you ever used that, jim? >> i used a waiter. i use open table conpoint. >> you're a social -- you know, you need a cnbc i think. i've never tried it. what do you use it for? >> to look at the menu first and to see whether i have to wait, i order vegetarian, so you know whether the place serve vegetarian before you get there. it's a nice ecosystem for people who want to know what they can eat. >> do you think grub hub and all these others should be going up with it? >> grub hub knows yelp wants to attack grub hub. you have a warn there. i was thinking if yahoo! were to buy yelp and buy grub hub, then you could have this absolute fabulous app. but there's not a lot of love between yell yelp and grub hub. they're all great. by the way, kayak was bought by price line last year. the cheapest way to go there, who to stay with and now who to eat with. now priceline has public together a fabulous trio. >> i'm trying to think of the world in ten years where