  One of the remarkable features of high-multiplicity hadronic events in
proton-proton collisions at the LHC is the fact that the produced particles
appear as two "ridges", opposite in azimuthal angle $\phi$, with approximately
flat rapidity distributions. This phenomena can be identified with the
inelastic collision of gluonic flux tubes associated with the QCD interactions
responsible for quark confinement in hadrons. In this paper we analyze the
ridge phenomena when the collision involves a flux tube connecting the quark
and antiquark of a high energy real or virtual photon. We discuss gluonic tube
string collisions in the context of two examples: electron-proton scattering at
a future electron-ion collider or the peripheral scattering of protons
accessible at the LHC. A striking prediction of our analysis is that the
azimuthal angle of the produced ridges will be correlated with the scattering
plane of the electron or proton producing the virtual photon. In the case of
$ep \to eX$, the final state $X$ is expected to exhibit maximal multiplicity
when the elliptic flow in $X$ is aligned with the electron scattering plane. In
the $pp \to ppX$ example, the multiplicity and elliptic flow in $X$ are
estimated to exhibit correlated oscillations as functions of the azimuthal
angle $\Phi$ between the proton scattering planes. In the minimum-bias event
samples, the amplitude of oscillations is expected to be on the order of 2 to 4
percent of the mean values. In the events with highest multiplicity, the
oscillations can be three times larger than in the minimum-bias event samples.
