This "prank" could leave someone severely injured, and they wouldn't even see it coming. Literally. 

Bicyclists should beware of fishing line strewn across a trail on the west side of Flint near the Court Street and Bradley Avenue according to ABC 12. While this is the trail that has been reported with this issue, it's definitely something that could happen anywhere. It totally sucks that such a thing would be done, but if we can't stop it from happening, the least we can do is be aware. Tell your cyclist friends, and ride safely!