It's the little things that make you realise someone's situation is not normal. Or at least what most consider normal.
In this case, when we were visiting Tijuana's largest refugee camp, El Barretal, it's also the little things that make you realise how very lucky you are.
And how it's pure luck which family brings you into this world and what opportunities come with it.
Ronan Perez, a migrant from Honduras, agreed to do an interview with us inside El Barretal. He was carrying his five-year-old son, Rodriguez, on his shoulders.
One of the things I noticed was the little boy had a scab just inside his nostril, like he'd cut his nose.
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And as is the case with lots of little boys, he had a snotty nose. But because of the scratch, which had been bleeding, it looked sore and like he needed a tissue to clean it up and maybe some disinfectant.
But Rodriguez seemed pretty oblivious to it, just sniffling and picking his nose occasionally. I wanted to grab a tissue and clean his nose, but I didn't want to intrude.
When I was little, I remember Mum would always tell me to clean my face with a facewasher if it was dirty.
These little children don't have facewashers. And despite not having much at all, their parents are doing their darnedest to create a better life.
Equally, one of the most wonderful things about children is their oblivion to the reality sometimes.
The camp has an area where children can run around and play. There are boys kicking soccer balls and little girls skipping and smiling - most with no idea why they are here or where they're going next.
One little girl was holding a litre bottle of Coke to her mouth, drinking, and spilled it all down her top. She just giggled and started wiping her wet T-shirt with her hand while licking her lips.
The children look happy. I wondered if that gave their mothers and fathers in the camp hope - to keep going.
For them, this situation must be far harder. They understand what they've left behind and the uncertainty their families now face. None of them speak English, or if they do it's very little.
When we did interviews, sometimes I didn't need to wait for the translation to know they were reaching a subject that was difficult to talk about.
Ronan Perez is trying to get to Tennessee with his wife and two little children.
When I asked him why he fled Honduras, I knew he was getting upset.
People don't express sadness just with tears. Their eyes go glassy... and an expression starts to develop underneath the expression they're trying to maintain to hide it.
Ronan went on to tell us that his cousin had been murdered by gang members because he'd refused to sell drugs for them.
That was the very first interview I did inside the camp. And the reality of this very dire situation for so many hit me like a ton of bricks.
These hundreds of migrants are desperate.
They have nothing to lose.
They want to work.
They want a better life.
But try telling that to a man who promised to build a border wall in order to become President of the United States. And told the American people; 'They're bringing drugs, they're bringing crime, they're rapists.'
I can't say that picture is consistent with what I saw inside El Barretal.
Maybe he should pay a visit.
Maybe it wouldn't make a difference.
See the full story on Nine News at 6pm.