hill repeats
https://www.youtube.com/watch?v=NtDgRACCJ20
winning English National XC Champs
https://www.youtube.com/watch?v=yutMkLM1t5U
the sub 2 marathon
https://www.youtube.com/watch?v=SZrKLx8TiLU
Olympic marathon start
https://www.youtube.com/watch?v=TVWcXpHy0PM
half way under the hour
https://www.youtube.com/watch?v=aT-AfLycsEo
the wall