http://youtu.be/rZzWyQC1Ja0 Niki and Sammy challenge Josh Pieters and Jack Maynard to Stand Up To Cancer with YouTube's space hopper challenge! Get your free fundraising pack: https://www.standuptocancer.org.uk/ge... Twitter: https://www.twitter.com/standup2c Hashtag: #StandUpwithYT Instagram: @standup2canceruk To give £10 or £5 text STAND10 or STAND5 to 70404* * + 1 std rate msg. UK mobiles 16+ only. Get bill payer’s permission. https://www.SU2C.org.uk/terms. 100% of your donation goes to Cancer Research UK in support of the SU2C campaign.