A backyard reveal pulled in 161.8 million views this month, which by Instagram’s own outlier tracking is roughly 99 times what a typical reel from that account normally draws. The creator behind the reel spent weeks turning an old school bus shell, already buried in his grandparents’ yard, into an actual finished room, working in secret before filming their reaction to the walkthrough. The bus itself is the part worth slowing down on. Burying a vehicle shell as a structural starting point is a real, if unusual, shortcut that off-grid builders have used for decades, and the reasons it works say more about underground construction than the surprise framing lets on.
Why a School Bus Makes a Decent Buried Shell
The most famous example of this approach isn’t a backyard prank at all. Ark Two, the Canadian fallout shelter profiled by Interesting Engineering, was built from 42 school buses arranged in an intersecting pattern and surrounded with reinforced concrete roughly four meters underground. The builders chose buses specifically because they’re spacious enough to hollow out and redesign, structurally sound as a starting skeleton, and cheap compared to pouring an equivalent space from scratch. A single buried bus scales that same logic down to backyard size: you get a pre-built steel shell instead of framing a room from nothing, then finish the interior once the structure is sealed and reinforced.
What Going Underground Actually Costs
None of this is a weekend project, and the price tag reflects that. According to HomeGuide’s own cost breakdown, underground bunkers and buried rooms typically run $200 to $400 per square foot installed, putting an average 200-square-foot shelter at $40,000 to $80,000. Smaller, economy-grade spaces around 100 square feet can come in lower, between $20,000 and $40,000, while elaborate luxury builds can climb into the millions. Where a single buried bus lands within that range depends heavily on excavation depth, whether the shell needs full concrete reinforcement, and how far the finish work goes toward making the space feel like an actual room instead of a sealed container.
Turning a Buried Shell Into a Livable Room
Getting from empty bus to finished space is where the real labor happens. A bare steel or fiberglass shell buried in soil needs waterproofing against groundwater intrusion, a drainage plan so water doesn’t pool against the exterior walls, and enough structural reinforcement to handle the weight of the earth pressing in from every side, not just from above. Ventilation has to be engineered in deliberately, since a sealed underground room has no natural airflow the way an aboveground addition does. None of that shows up dramatically on camera, but it’s the difference between a hidden room that lasts and one that floods or fails within a season.
The Permits Nobody Mentions on Camera
What a viral reel never shows is the paperwork that’s supposed to happen before the first shovel goes in. BigRentz’s own guide to building an underground bunker notes that projects like this typically require grading, building, plumbing, and electrical permits depending on the jurisdiction, plus a call to 811 to have utility lines marked before any excavation starts. The same guide recommends cut-and-cover excavation with proper trench shoring rather than manual digging, since a collapsing trench wall is one of the more common ways backyard projects like this go wrong. Reinforced concrete walls one to three feet thick and metal support beams are standard recommendations for anything meant to hold soil pressure long-term, which is a very different scope of project than most people picture when they hear “hidden room.”
A Bigger Trend Than One Reel Suggests
What’s driving views here isn’t just the surprise on the grandparents’ faces, it’s the fact that the underlying project is real, load-bearing construction rather than a decorated shed. People have been burying vehicle shells to build cheap structural space since long before this reel existed, and the format works because it takes something viewers assume is a joke setup, a school bus sitting in a backyard, and treats it as the serious engineering problem it actually is.
Most viewers will never bury a bus in their own yard, but the reel taps into something homeowners already understand: an unused patch of ground and an old structure nobody wants to pay to haul away are usually worth more as raw material than as junk. The grandparents got a finished room out of a bus that would otherwise have sat there rusting. The build just happened to also be one of the more technically involved backyard projects anyone has pulled off on camera this year.