this is in whistler, british columbia. this particular zipline is particular. it's the largest in north america, 2,000-feet long. >> wow! >> and a 20-story drop. >> wow. >> oh, so out over this little river there, some buildings, a perfect ride. here's where it doesn't go as possibly good as it could have. the guy gets to the end of the 20-feet, he starts to slide break t. automatic brake that is supposed to catch you isn't working. now you see the guy going if reverse. >> oh, no! so whu ato . you don't know somebody is coming. >> they don't go until the person in front off is off the lean and they don't have to worry aunt running into here's the zip this. >> this is the longest zipline operation in america. >> eventually, gaep gale comes to his rescue, shimmys her way back andls thi guy in. >> oh, my goodness. >> he's fine, into big deal. >> i'm going to have to pay double for this ride. >>> there is a new trend hitting the streets, you guys. it's called baby muggg. oh! that's funny. yeah, these are mugs babies. is that amazing or what? >> how big are those mu