Clutch issues

So I went on a good and long off road trip. Very steep, and very bumpy. About an hour or so into the trail I noticed my clutch was acting kind of funny, like not coming out all the way. Eventually the pedal just stayed at the floor. I had to physically pull it up off the floor. It happened two or three times. Now it's completely normal, any ideas?

 

Total guess here, but maybe something got down in the accumulator and made it act up?
Or maybe it just acted up on its own?

FYI, if you don’t know what the accumulator is
https://www.tacomaworld.com/threads/mt-accumulator-delete-mod-adm-and-bs-thread.568303/

 

Have you checked the fluid level in your clutch reservoir lately? Maybe you sloshed some air into the system and eventually, pumped it back up into the reservoir. I don't know if this is possible but I've swapped the fluid in my reservoir a few times and after a few weeks, it was dirty again. It finally stayed clean after a few weeks so I assumed it was fairly well changed out.
Just a guess.