Less than seven years before collecting a $17.9 million windfall from selling his stake in Arrow Energy, Queensland resources entrepreneur Stephen Bizzel l put down a personal guarantee to help prevent the then struggling junior coal seam gas explorer stay afloat.

“We were on our knees," Nick Mather said, who also gave a guarantee for Arrow, without much of a second thought such was his faith the play in the then largely untested CSG industry would succeed.