Tumble Through

Stride. You can try to move through the space of
one enemy. Make an Acrobatics check vs enemy's
Reflex DC when you try to enter its space.
Success: You move through the enemy's space, treating it as difficult terrain. If you don't
have enough Speed to move through its space,
you get a failure instead.
Failure: You don't move, and you trigger
reactions as if you had moved out of the square
you started in.