I need an icon that expresses exhaustion

I contemplated using my "zero fucks" icon but that's not right either. There are a lot of things I care about a great deal and I cared a great deal about many things that happened this past weekend. I'm just worn out. This entry was started two days ago; now it's Thursday and I'm having trouble staying awake at work. I kind of spectacularly failed my 5-2-1 this year, mostly the 2.
( I worked a lot this year )

( I did have a Con and did some things )

( Among the things I did were a couple panels )

Overall this Arisia gets a 6/10 from me. With better planning and foreknowledge on my part that would've been an 8/10. Live and learn.