What does the machine on the roof of the northern line platform at kings cross do?

Question

the machine is on the ceiling of the northbound northern line platform, it seems to fire some kind of beam into what looks like glass reflectors that run the length of the platform on the far wall, the machine then turns around and fires into another set of reflectors.

Answer 1

They are trying to re-create Willy Wonka and send mars bars from one end of the platform to the other.

Honest.

Answer 2

Incase someone jumps to commit suicide on the dc current electricity lines it will signal the train someone has jumped and the train will stop. Electricity does go through the lines unless that train is 40metres on approach.dont tell anyone but dont jump unless its within 40 metres, and if you do you will smell like ham. i saw it happen 180000volts at a trainstation in sydney one night.

A 35 year old lady jumped to kill herself(on the powerlines to burn) at westmead station but instead she broke her arm. They cops took her to westmead hospital for assesment, she commited suicide the next day.

Answer 3

Thanks for the tip-off. This is clearly the work of SPECTRE, rather than "Transport for London".

I have passed your observations to "M", who has a secret siding near Swiss Cottage. [Blast! I keep doing that.]