Lyric discussion by maggie1108 

Cover art for Air Catcher lyrics by Twenty One Pilots

I think he's using a parachute as a metaphor. Parachutes catch air underneath them, that's how they keep people in the air (where they want to be) and safe. "My parachute will get me safely to ground. But now my cord's not working and I see you staring me down" almost sounds like he's referring to Blurryface, like someone wants him dead. "Who is Blurryface and why does he want me dead" seems like it could fit the song.