I hate it when this happens

I Just finished putting new shingles on my our house. I am feeling like Forrest Gump when he says " I saw the president Again". I will tell you why last year I put cement board siding on our Garage and got all the way to the last piece and smashed my finger on my left hand with the hammer. It healed well job done well good deal. Fast forward to early October I have 40 bundles of shingles to put on. Work my way up and around on the roof about 13 squares . Putting on the hip and ridge shingles to Finish the job on the last nail I hit the one Nail I didnt want to the very same one I NAILED before. Job is DONE . I have about 30 years to wait to put shingles on the house. But the Garage is going to need them sooner and next time I am going to be very careful!