Apparently all you need is a mildly convincing rubber snake and a bit of fishing line to find out how fast your friends can run…who knew it was so easy? Be a good pal and don’t go pulling this prank in any sketchy backcountry areas because dropping into an unanticipated dead sprint on uneven terrain could lead to injury. Also be prepared to for overwhelming and disproportionate retribution because you just scared somebody the poop outta your friend:

Francis Xavier is a seasoned writer for Unofficial Networks, bringing a lifetime of outdoor experience to his work. Having lived in a ski resort town for years he has a deep connection to mountain culture.... More by Francis Xavier