Imagine I am sitting on a lead ion and fly happily through the LHC tube . Suddenly I feel an strong force pushing me sideways to the left. A physicist sitting in the lab frame tells me later, that I have been going through a dipole magnet yoke with field lines from top to bottom. How do I understand the force which is dragging me on the quantum level? Is it possible to describe this with collisions with virtual photos? If yes, then why to the left and not some other directions?