  I apply the jittering jets in cooling flow scenario to explain the
perpendicular to each other and almost coeval two pairs of bubbles in the
cooling flow galaxy cluster RBS 797, and conclude that the interaction of the
jets with the cold dense clumps that feed the supermassive black hole (SMBH)
takes place in the zone where the gravitational influence of the SMBH and that
of the cluster are about equal. According to the jittering jets in cooling flow
scenario jets uplift and entrain cold and dense clumps, impart the clumps
velocity perpendicular to the original jets' direction, and `drop' them closer
to the jets' axis. The angular momentum of these clumps is at a very high angle
to the original jets' axis. When these clumps feed the SMBH in the next
outburst (jet-launching episode) the new jets' axis might be at a high angle to
the axis of the first pair of jets. I apply this scenario to recent
observations that show the two perpendicular pairs of bubbles in RBS 797 to
have a small age difference of <10Myr, and conclude that the jets-clumps
interaction takes place in a distance of about 10-100 pc from the SMBH.
Interestingly, in this zone the escape velocity from the SMBH is about equal to
the sound speed of the intracluster medium (ICM). I mention two other clusters
of galaxies and discuss the implications of this finding.
