Mid-battle retreats

[Kenpachi Zaraki]

There's a bit in the fight rules about escaping. fights.php#Escaping_Fights

Basically if you aren't too far into the battle, it's possible. I assume this is to prevent people from queuing up and chickening out at the last minute. In your scenario it seems likely that it would work if you had (as mentioned in the link) a large enough difference in your SPD stat, a flashbang, teleportation or a burst movement/super speed. It's still up to the discretion of staff, though, and the opponent can still choose to chase if if they want to. So, possible. Make sure your lookout has some escape tools/powers. =P

EDIT: BAH. Yellow Flash beat me.