some promposals, they spend so much money. something like this, it means a lot more. >> i agree with that. my budget was solid. i like my budget. >> reporter: how much do you think you spent? >> 30. maybe. >> it was priceless. >> reporter: and before we left, kaple had one more message for promposals. >> i challenge you to top me. do better. i'd love to see it. >> reporter: up next, the woman who chased down her alleged harasser using social media to sound the alarm. >> get this guy. stop this guy. >> reporter: and later, highlights from the super bowl of fashion. how celebrities embraced the futuristic theme. doctor about your medication... this is humira. this is humira helping to relieve my pain and protect my joints from further damage. this is humira helping me go further. humira works for many adults. it targets and helps to block a specific source of inflammation that contributes to ra symptoms. doctors have been prescribing humira for over 13 years. humira can lower your ability to fight infections, including tuberculo

the finishing touches on his promposal. tomorrow he'll hand this oversized prom ticket to his girlfriend at the end of her high school performance. >> i'm going to use it to get her to come with me instead of go with the captain that she's been in the play with. >> reporter: he's convinced the pay off on social media will be worth it. >> go big or go home, i guess. >> reporter: the next morning his nerves are starting to show. >> i'm sweating a little. >> reporter: friends and faculty give him a last-minute pep talk. at last, it's time for his pr prompos promposal. he strides to the stage. his girlfriend's jaw dropping response, worth the wait. >> move over, captain. mcken in a, i have your ticket and your suitcase packed. will you go to prom with me? >> yes. [ applause ] >> reporter: once a promposal is posted online it gets an instant viral boost when twitter handles and hash tags are around them. a 17-year-old promposal is the kind people love to like on twitter. >> everyone comes up to me the next day at school, thanks

a heart warming "promposal." what makes this particularly proposal so special. >>> we're tracking that chance of a thundershower still in the bay area, especially the south bay. we'll be tracking that and the future for friday's forecast. >>> new at 6:30 tonight a prom invitation that a special needs student at folsom high school may never forget. >> reporter rob malcolm tells us the elaborate lengths that her dated, her family, and volunteers all went through to make at magical. >> i she has no idea at all. so that's going to be very fun. it's going to be fun. >> at 6' 6", 290 pounds, cooper richardson is a gentle giant. >> it's a little nerve-racking, but have fun, stay calm. >> he's asking a girl to the prom. >> maddie thompson morally, will you please come up here. >> when her name was called she ran and conor stepped out and popped the question. >> will you go to evening dreams with me? >> yes, i would love to. >> dry eyes were hard to find. this saturday maddie and keeper will be arm and arm for the evening

than the prom as kids spend more than ever going to extremes to outdo each other for the biggest promposal>> i had to get his face. i had to get something on him. >> call the cops. >> reporter: the response on social media, astounding. >> i was 100% sure it was the same guy. >> we explore the ups