Train goes through a tunnel your ears pop a little?

[matt_crouch]

how come when a train goes through a tunnel your ears pop a little? is it due to the pressure increasing?

or are my ears just weird

 

[mgb_phys]

Yes - high speed trains have to be sealed to prevent this.

 

[brewnog]

There's a joke in here about the eu-station tube, but I can't work it out just now.

 

[Danger]

There's a joke in here about the eu-station tube, but I can't work it out just now.