Answer:
I am asleep when you are awake I am awake when you fall asleep. I can fly but no feathers to aid my flight.
Better touch me before you proceed to second.
Though not a plant I have leaves. though not a beast I have spine. Though many wouldn't need me I am more valuable than wine.
score in end zones.
If a man carries my burden they will get crushed to death. Though not rich I leave silver in my track.
I am your mother's brother's only brother in law. Who am I?