You see producers create the videos where tubs or swimming pools are filled with shaving cream. Well I have maybe a dumb question, but here goes.

You have to press down on the top of the shaving cream can to empty it. After so many cans, doesn't it hurt your fingers?

Two words: G-clamp.

That doesn't look too practical. lol

It does but its worth the pain

In my personal WAM adventures I've filled a tub with shaving cream on 5 different occasions using anywhere from 40 to 60 cans and I will say it does get uncomfortable on the tail end of spraying. Obviously that hasn't deterred me in the slightest as the outcome is more than worth the work but I have heard of someone using these before to make short work of it all:

https://www.lowes.com/pd/IRWIN-QUICK-GRIP-2-Pack-4-25-in-Clamps/1000235699?cm_mmc=SCE_PLA-_-ToolsAndHardware-_-ClampsAndVises-_-1000235699:IRWIN&CAWELAID=&kpid=1000235699&CAGPSPN=pla&store_code=1907&k_clickID=7c83cdf1-9acc-4a2f-a0c7-71dce9fda1a6&gclid=EAIaIQobChMIp5y93q6_3AIVl4zICh2rqQxZEAQYBCABEgKOtPD_BwE

It is not so much the pain that annoyes me but the time you spend waiting untill the cans are empty...