Ultimately, this special teams mishap cost the Bills about 18 yards in field position and about 2:12 of possession time depending on how accurately you measure it:
* Fake punt took place with 10:49 remaining in the 2nd Qtr from the Denver 43-yd line
* Real punt took place with 8:37 remaining in the 2nd Qtr from the Buffalo 39-yd line.
Bills did well to dig themselves out from their own 1-yd line, but the psychological effect (loss of momentum) of the fake punt's success could have been magnified even more had the defense not stepped up to force the 2nd punt to begin with. Every little detail is crucial in games like this. Fortunately, the Bills were good enough to not let it impact them too badly, but just can't make these sorts of mistakes.
The "doink" didn't hurt, either!