![I hear locomotive smoke
is the second leading cause...
I hear locomotive smoke
is the second leading cause...](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
I hear LOCOMOTIVE smoke
is the second leading cause...
The Big Bang Theory Season 8, Episode 22
![and I get to operate an actual locomotive.
and I get to operate an actual locomotive.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
and I get to operate an actual LOCOMOTIVE.
The Big Bang Theory Season 10, Episode 15
![If you listen carefully when
the locomotive disconnects,
If you listen carefully when
the locomotive disconnects,](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
If you listen carefully when
the LOCOMOTIVE disconnects,
The Big Bang Theory Season 7, Episode 15
![](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
"You are running the LOCOMOTIVE."
(GASPS)
The Big Bang Theory Season 10, Episode 15
![I bought an N-gauge locomotive.
I bought an N-gauge locomotive.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
I bought an N-gauge LOCOMOTIVE.
The Big Bang Theory Season 5, Episode 3