Not sure whether this was a short film, TV series or what.... Early 70s and was shown frequently in the morning during the old 'Schools and Colleges' schedules. Don't remember it being educational though! It was Australian and the only part I remember is two stereotypical ausssies driving through the outback in a truck. They get out to repair a flat tyre and one gets bitten by a snake. Thought about it whilst watching Walkabout last night. A bit vague but that's all I remember!