Ever seen the original animation? It was even more awesome, because the wings clicked open one by one. Fucking BADASS
Why does it even open? Like, what tactical purpose does that serve? We could have had probably another half kilo of explosive in there if we take out the springs.
The spingy arms are what detects pressure and gives the mines better anti inf capability, as the foot has to go anywhere near inside radius instead of hitting one point. It also gives them superior friction, allowing them to stay in place on slopes. Emp's mines only look anti veh, but act more anti inf and you dont need tonnes of TNT to do that job.
I do remember the uber mine activation. You pulled a ripcord and the middle spun around slowly while clicking and the legs expanded one at a time.