Jangoosed | Halo: Reach | Searph Warp @Jangoosed | Uploaded October 2016 | Updated October 2024, 11 hours ago.
Happened while messing around, guess the Seraph that blows up the wall spawns in a separate location to the rest (since only one Seraph needs to take that path) then moves it to the right location. The Seraph may have been visible in the initial area due to lag.