  There are different versions of collisions of two particles near black holes
with unbound energy $E_{c.m.}$ in the centre of mass frame. The so-called BSW
effect arises when a slow fine-tuned "critical" particle hits a rapid "usual"
one. We discuss a scenario of collision in the strong magnetic field for which
explanation tuns out to be different. Both particles are rapid but the nonzero
angle between their velocities (which are both close to $c$, the speed of
light) results in a relative velocity close to $c$ and, hence, big $% E_{c.m.}
