But the boys knew better - for here the tunnel went up!

When it looked as if our tunnels were not going to meet, he took the blame upon himself.

He switched off the light and the tunnel went dark.

He was sure of only one thing the tunnel went somewhere.

I didn't have much time to decide; the tunnels might go any second.

Then there was a crunch from above, and the tunnel behind them went dead black.

I think these tunnels go way into the mountains and deep down.

The guy could probably use a good night's sleep and those tunnels weren't going anywhere.

Which makes all kind of sense because a tunnel is going to always be less efficient.

They learn that the tunnel is going to be blown up.