New Idea
Find some jams with a time length that matches an obtainable PR for certain race distances. Race to finish the distance before the end of the jam.
Distances of 5k, 4 miles and 10k.
Looking for jams lasting 21 minutes, 27 minutes and 43 minutes.
Ideally something with sustained intensity with a nice peak close to the finish.
There must be a nice Scarlet->Fire or China->Rider out there that fits the bill.
A jammed out Run Like an Antelope?
Huge loser much?