I don't think you should push a Walmart bike that far. I think I would hurt myself on any bike trying that. It's way beyond what I've done. Never rode BMX or motorbikes, I know you have experience and skills I lack. I almost feel like I could ride off that and land it, but I don't think I'd try. Weighing risk vs. reward, for me it wouldn't make sense.

Consider how far you are from help should it go horribly wrong.

Use your best judgement. If this stunt is easily within your capabilities, go for it. If in doubt maybe you can find something similar closer to the road. At the MTB terrain park you mentioned in a previous post, perhaps?