Simple: You're not supposed to rev the engine while stationary. This helped your already-deteriorating fan blades explode causing pieces of the blade to puncture your transmission cooling lines. Your trans fluid leaked out thus rendering the transmission useless. If you're lucky, you may be able to repair the lines, refill the trans and go on your way. If not, then you tried driving your car without fluid and fried the transmission. Do not blame this on Seafoam.