![I hear locomotive smoke
is the second leading cause...
I hear locomotive smoke
is the second leading cause...](https://content2.mcqstudy.com/ss/tbbt-8-22-00:11:39.165.jpeg)
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.](https://content2.mcqstudy.com/ss/tbbt-10-15-00:04:56.297.jpeg)
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,](https://content2.mcqstudy.com/ss/tbbt-7-15-00:06:37.682.jpeg)
If you listen carefully when
the LOCOMOTIVE disconnects,
The Big Bang Theory Season 7, Episode 15
![](https://content2.mcqstudy.com/ss/tbbt-10-15-00:02:54.425.jpeg)
"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.](https://content2.mcqstudy.com/ss/tbbt-5-3-00:17:41.613.jpeg)
I bought an N-gauge LOCOMOTIVE.
The Big Bang Theory Season 5, Episode 3