  We study an interesting region of phase space at the LHC for pair-produced
stops decaying into hadronic top quarks and light neutralinos. After imposing a
sizeable cut on the missing transverse energy, which is the key variable for
reducing backgrounds, we have found that the two hadronic tops are likely to
merge into a single fat jet. We develop a jet-substructure-based strategy to
tag the two merged top-jets and utilize the MT2 variable to further reduce the
backgrounds. We obtain about a 50% increase to the ratio of the signal over
background and a mild increase on the signal discovery significance, based on a
signal with a 1.2 TeV stop and a 100 GeV neutralino, for the 13 TeV LHC with
100 fb$^{-1}$. The general event kinematics could also occur and be explored
for other new physics signatures with large missing transverse energy.
