Abstract: As data flows in from the LHC, unexpected signals are inevitable. The key question will be: are these 'surprise' signals new physics or do they point to a mis-modeling/misunderstanding of standard model physics? To disentangle the possibilities requires crosstalk between experiment, QCD/Monte Carlo, phenomenology and model building. The W+jj excess observed by CDF last year gave us an example of this process at work. I will elaborate on the efforts to explain this excess -- which remains unresolved -- in the standard model and beyond, and what we should look for at the LHC