Grendel insists that his death is an accident because he slipped on the blood of Heorot and so Beowulf was able to take advantage of his misstep. Therefore, it is not that Beowulf is actually stronger than Grendel; instead, Grendel's loss to Beowulf was only a slip on his part.
The speed and accleration of a car travelling in reverse and in the normal direction is the same. Therefore the measurement of its speed is still done using the metric system or via miles per hour (mph).
