When the landslide happens outside the mine entrance, Rian pushes Vic out of the way and they both fall down a couple feet away from each other, the next scene is after the rock fall and they are getting up, only Rian is partially on top of Vic.
The wheelbarrows being loaded to take up to the mine are not an industrial/mining wheelbarrow. They are common shallow garden wheelbarrows of the type found in the US in the 50's and 60's. They are shallow and very light weight. Not the type that would be seen in a mining operation.