Whether you want to admit it or not, this may or may not have happened to you. Newbs riding Segways aren’t the only ones scrambling for gear minutes before a trip. To be fair, gear not only keeps us dry, it saves lives. In some cases, you’re not even allowed to access certain terrain without the right gear (like in the sidecountry).
It’d be ill-advised to rush into the backcountry without some planning, but at some point in every enthusiast’s life, you just need to pack the essentials and GTFO. Hopefully you’ll have more than 15 minutes of sunlight when you do so.