Model for no-go mRNA decay in yeast. Stem-loop structures, pseudoknots, and rare codons cause the translating ribosome to stall within the coding region of an mRNA. The stalled ribosome is recognized by the Hbs1p/Dom34p complex. Subsequently, the mRNA is cleaved endonucleolytically, generating 5’ and 3’ fragments that are degraded by the exosome and Xrn1p, respectively.