Lucky man discovers 160 free bowling balls buried beneath his home David Olson's discovery of this real treasure trove came while renovating his home in Michigan ...

Another tactic is to offer four weeks of free bowling classes, with students getting free bowling balls at the end. The hope is that owning a bowling ball will turn them into lifetime bowlers ...

The free yard-fill notion has emerged as the most widely accepted theory for how David Olson ended up with 158 bowling balls that day (plus four he has found since then) under his yard.

David Olson was renovating the back steps at his Michigan home when he discovered over 100 bowling balls buried beneath the property.

Another tactic is to offer four weeks of free bowling classes, with students getting free bowling balls at the end. The hope is that owning a bowling ball will turn them into lifetime bowlers ...