Upvoted you because you used the word #challenge and we are promoting the @challengedac https://challengedapp.io I'll give you some CHL tokens if you download the app test it out, we are listed on steem-engine so here's some 101 CHLP :D
Download on Playstore , Challenge Dapp or Challenge & Fun on iOS
come check out the telegram! https://t.me/challenge_dac

urban legends could be cool challenge for the app, challenge @ackza to go to the San Diego Haunted House Whaley House in old Town lol, and stay for an hour at night at a haunted house :D