We've all been there; seen the finish line in the distance and wondered how we could get there faster.
Well, turns out mum Katie McDermott, 25, works harder, not faster.
The mum was taking part in the parents' race at her daughter's sports day when things got serious.
The race was neck and neck between Katie and another mum, but when she realised she wasn't going to win, she pushed the other mum out of the way.
As you can imagine, the woman went flying, and Katie won, but at what cost?
Turns out a pretty fair one, actually, because she was trying to keep a promise to her daughter.
Wonder if that excuse would fly at the Olympics?
Still, Katie didn't realise quite how hard she pushed the other mum: "I told my daughter I would be number one, so I had to be!
"I could see she was winning - so I just gave her a quick nudge and she took off in the air.
"I don't know what possessed me to do it, I was just thinking about how I wanted to win so badly!"
The mum went on to apologise: "I didn't know the mum very well - everyone was shocked but we just carried on as normal afterwards.
"If you see this, sorry that I pushed you - I didn't mean to send you flying!
"I don't regret it, though, because I won!"
Still, Katie's not the only parent taking the race pretty seriously, with a host of others taking to Twitter to comment on their race.
One user wrote: "Ah sports day when all the mums and dads get super competitive for the parent's race hope the sun shines for you all."
While another brought up good old Princess Diana: "This got me thinking about sports day - and whether she is super competitive about the mum's race. Looks like Princess Diana used to be a fast starter!"
A third was new to the race but had the heart of a winner: "but i'm excited about sports day as i've not done it before. and i'm super competitive and i want to win ANY MUMS RACE oh yeah oh yeah."
One was relieved the race wasn't on: "5-year-olds sports day was today, no races for mum's/dad's anymore but as some of the parents when my eldest was at the same primary school were super fast and competitive perhaps it's a good thing I'm not finding out if it's the same now."
Just how competitive were your family at sports day?