 Earman and Norton (1998) observed several curious facts about this system. First, unlike Thomson’s lamp, this supertask does not require unbounded speeds. The total velocity of the system is never any more than the velocity of the original moving particle. Second, this supertask takes place in a bounded region of space. So, there are no boundary conditions “at infinity” that can rule out the supertask. Third, although energy is conserved in each local collision, the global energy of this system is not conserved, since after finite time it becomes a lattice of infinitely many particles all at rest. Finally, the supertask depends crucially on there being an infinite number of particles, and the width of these particles must shrink without bound while keeping the mass fixed. This means the mass density of the particles must grow without bound. The failure of global energy conservation and other curious features of this system have been studied by Atkinson (2007, 2008), Atkinson and Johnson (2009, 2010) and by Peijnenburg and Atkinson (2008) and Atkinson and Peijnenburg (2014).