If a god manifests, then read the guide on
How To Fuck Off, then apply the lessons contained within.
It's honestly the best plan for survival.
EDIT:
Step 1: Fucking off must be done quickly, and with the minimum of fuss.
Step 2: You should ensure you are aware of all available escape routes at all times. Bearing this in mind, it might be wise to ensure you are intimately familiar with all locations you are likely to enter. Do not enter a new building, for instance, unless you have identified all possible exits, and maybe even several impossible exits - it pays to be thorough. Please note: only attempt to use impossible exits if all possible exits are blocked or otherwise taken out of the equation.
Step 3: It is vital that you become skilled in the art of choosing the optimum direction. Remember the first lesson - you have little to no time to assess the situation, so you must be able to choose your route, and then fuck off rapidly. Consider your options quickly and carefully - a simple door might look inviting, but who knows what lurks on the other side, waiting to impede your progress? What's more, the door itself might be locked and unless you have perfected the art of Daffy Duck, you'd be, well, fucked. You also need to be aware of any obstacles between you and your preferred exit. Static objects, people, moving objects, heavily fortified machine gun nests - any of these could potentially ruin your chances of successfully fucking off. Finally, consider where your route is likely to lead. Ideally, you are after somewhere quiet, away from your current intimidatory situation, and with the scope to fuck off further if required. Outdoors is good, upstairs is generally bad unless you are in a basement (being several storeys above ground really limits your options unless you have a handy parachute).
Step 4: Leave your current location. Quickly. In your chosen direction.
Step 5: Arguably the most important step of all is staying fucked off. Once you have put significant distance between you and the guy telling you to fuck off, do not, under any circumstances, return to that location. Ever. Seriously, it's not worth the risk. UNDER NO CIRCUMSTANCES should you be tempted to return to the scene of the off-fuck. People have long memories, and even if the guy who told you to fuck off has left, others may remain who did not order the off-fuck, but who nonetheless tacitly endorsed it.