When you absolutely know something is a bad idea there is no need to do it just to be sure – applying the front brake alone while cornering on gravel.
Check your pump when someone at work has borrowed it taken it apart and used bits of it to convert the air gun to blow up their tyres.
You can take someone's pump apart and convert the air gun at work to blow up your tyres.
If the person who has borrowed your pump reassembles the pump in a certain way and put it back on your bike without mentioning it you will get a flat on your next ride at the furthest point from home and will bend your valve core on your spare tube as you try to fit it.
When the little voice says "stop, what you have is usable and if you try to improve on it will only get worse" listen. – When thinking no I can get a bit more air in this knackered tube.