(yes you can relight but i dont like to do that in front of a crowd, it usially takes away from your proformance)(practice these first before you use it with fire!)
the longer the poi the better for these.
these are a couple moves i do with only 1 poi when 1 goes out and so i drop it:
(1) have it in your right hand spinning backwards, then swing it starting from the bottom of it's rotation across your chest so it crosses infront of your body at a 45 degree angle (going from your right hip to your left shoulder)
as it is going up across your chest pass it off to the other hand (left) where it will continue going up at the same angle for a little longer. now start to change its direction in the air, so it will go way out to the left and come back in line to pass behind the back. the poi chain should be turning from pointing up in the air to down to the ground as it comes back towards your body.
now when it gets close to your body pass the poi from your left hand to your right hand as it swings behind your back, now just do a nice large arc with it to bring it out front again.
(you should have large long poi for this and make sure you have practiced this while it is not on fire first)
lets use the right hand again....
start off by swinging it in front of your body right where you would do a normal butterfly. now this takes a bit of practice but now much, put your left arm out in the way of the poi chain (2 inches from your hand that is swinging is perfect)
it should start to wrap on the wrist, let it go half way around your wrist then pull your wrist out to the left and back with the poi wraping on it. if done correctly the poi shrinks around your wrist but before it hits it's direction changes and it will swing up behind your back then out
(most other stuff i have is too complicated to explane so ill just make a movie and run it really slowly)