+ we would have to choose what to assign to each side + - we would have to decide who would flip the coin -

Flip it t-o-o-gether!

Well if y-o-o-u balance it -o-o-n b-o-o-th -o-o-f y-o-o-ur thumbs and then turn up at the same time!

I think s-o-o-! If it d-o-o-esn't w-o-o-rk, y-o-o-u can try s-o-o-mething else. BUT. N-o-o- shame in giving it a g-o-o-
+ okay + - we will try to flip a coin together as instructed -
+ we have launched the coin + - we have imbedded the coin in the ceiling - + there is now a coin in the ceiling + - we did not mean to use our psionics but we were focussing very hard on the timing and it just happened - + we will try again with another coin + - and focus less hard -

Hehe. Trial and err-o-o-r!
+ we have flipped a coin + - it took three tries - + we have embedded another coin in the ceiling + - the other one was too weak - + but we got it on the third + - it was heads -