Hostility Passing-By (すれ違いのホスティリティ, Surechigai no Hosutiriti) is the first story of the second episode of the anime series Full Metal Panic? Fumoffu.
After Sousuke causes a panic at the school's bread stand, Sousuke and Kaname have to fill in for the stand's lunchtime duties, which raises the ire of the physical education teacher. He attempts to sabotage their bread, but he falls for Sousuke's booby traps, when Sousuke was expecting that someone would tamper with the bread.
This story was originally unaired, but was later released along with the other unaired story A Hostage With No Compromises.