You may be looking for the rift that appeared in the rocket launch. If so, see Crack in the Sky.
Rifts are a means of travel introduced in Season 5. They are portals that when used, will send you above its location as if you were skydiving. This allows you to re-open your gilder. Rifts will disappear two seconds after they have been used. Rifts spawn all around the map, but are most common in Paradise Palms and the Viking Mountain near Snobby Shores. In a video posted by LazarBeam, he used rifts to survive until top ten without landing.