The statistically anomalous tendency for the telephone to ring while you are having a shit. Extensive studies have shown that the
phone of any individual has, at any given
time, a 500% higher chance of ringing while its owner is evacuating his/her bowels than during other common everyday tasks such as masturbation, hoovering and chimping. Some schools of thought consider telecoprolism to be a subset of the Sod's Law principle. The others
don't really consider such issues to be a worthy use of academic
time and resources.