If there is anything slower than a
then it might be a snail
Or, then again, myself? I went for a run recently and found that for an hour I was being stalked by a snail! Inside every fat man there are two 37-year olds trying to run sub 3-hour marathons instead of one 6-hour marathon.
Can you see the "larva"? - near the pair of stones, top, left of centre.