Training for trains

Pia and Dominic were watching animated Superman cartoons.  Superman was chasing a runaway locomotive. After he caught up with the train, Superman landed on top of the engine, grabbed a hold of the train,  then pulled on it until it stopped.

Pia was impressed, then looks at skinny Dominic:

Pia: Domu, can you pull a train like that even if you are so tiny and weak?

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