Sideways, yes, especially with loader in the air....straight up and down, no, especially with a box blade out the rear.
Now I've come dangerously close to hurting myself on my garden tractor while bush hogging some grassy slopes and losing traction. I've even slipped while hiking the property last year, fell a ways down, scraped myself up real good before almost breaking my arm on a tree that stopped my fall.
But I feel very safe on my tractor as I'm tucked in the gullies carving up a trail. Once I'm on an open ridgeline up towards the top....then I may have 2nd thoughts. I not sure of my plans there. Maybe back up with shanks on box blade extended and dragging, ready to dig in if I do lose traction