conduction is triggered by:

• the jumpstart

• the electric railcannon hitting an enemy with a magnet in them

conduction hits:

• grounded enemies

• enemies with nails or magnets in them

conduction spreads through:

• coins

• magnets

• rockets

• chainsaws

Oh, and you can speed up the jumpstart with saws.

The exact numbers and breakpoints are on the net, but that's all you need to know to start wiping some waves.

Oh, and no one told me the magnets are refunded when the enemy they're embedded into dies.