We now had five bikes with no brakes at all, one with a tacoed back wheel (the pilot reckoned it gave some braking in the turns as it rubbed against the chainstays), one bike with bent forks, one with collapsed front suspension. I had no useable gears and the saddle kept pointing to the sky no matter how tight I did the bolt up.
They were certainly not in a fit state to take on The Wall trail, so we retired back to the van and awaited the arrival of the last team member, who was on foot for the last 3km due to his catastrophic fork failure.
I have to admit to being surprised at how many had actually finished the ride, though the others pointed out that the above list of damage had occurred within the bikes first 11 miles from new. As for the question of whether these supermarket brand bikes are capable of anything a real mountain bike is…well, for a short, uncomfortable and terrifying period, they are! Assuming that you're willing to buy a new one each time – or spend some serious hours on repairs – you can take a BSO on proper MTB trails. We overtook people going up. And going down, but that was more by default than choice!
On a more serious note, however, most people will buy these bikes, build them in the living room with the tools supplied, and ride them on roads that they'll be sharing with HGVs, taxi drivers and teenagers in Citroen Saxos ... If you're coasting down to the main road and you find out then that your brakes don't work, it's a different – and much more serious – story. If you're going to own one, off road is probably the best place to ride it.