President Barack Obama has been traveling constantly since leaving for Asia on Saturday. Being president is tiring, and some photographers captured the president yawning at the plenary session of the Association of Southeast Asian Nations (ASEAN) summit in Phnom Penh, Cambodia on Tuesday:

(Photo credit: Jewel Samad/AFP/Getty Images)
Send us your best caption for this photo, either by tweeting one using the #ObamaPhotoCaptions hashtag or by leaving an idea in the comments section. Here are some of our favorites:
Loading Slideshow
RockR
@HuffPostPol #ObamaPhotoCaptions: "Decaf coffee sucks"
Morgan
GYEEAAAAAAI'M SO HUNGRY AND SLEEPY THAT I'M GOING TO BITE THE HEAD OFF THIS COFFEE-STUFFED BAT YEAAAAAAAAAAAAAAAA!!!!!! #ObamaPhotoCaptions
Wallace Ritchie
@HuffPostPol #ObamaPhotoCaptions #InvisibleHotPocket
Henry J Roman
@HuffPostPol MSG makes me sleepy! #ObamaPhotoCaptions
Terri Chambers
@HuffPostPol Better to yawn than to vomit in Asia. ;) #ObamaPhotoCaptions Looking at the picture made me yawn.
Phillip Singleton
Listening to the nominations in the Florida Senate #Sayfie #ObamaPhotoCaptions
http://t.co/GSrDLhOE
Jack Peterson
@HuffPostPol http://t.co/gj9qKV4X #ObamaPhotoCaptions om-nom-nom!! #nomnomnom
MIchael Petracca
You grow tiresome, JMac. Come, let us dance. Sprockets MT @HuffPostPol: Obama yawns. Send captions! http://t.co/tvisVGvA #ObamaPhotoCaptions
Zuli Rosario
Three more cups of coffee please! #ObamaPhotoCaptions
.45
In a "post Twinkie" world even POTUS will miss the cakey golden goodness. #obamaphotocaptions #twinkie http://t.co/OD9GFyMs
Damond Fudge
I should NOT have gone to that midnight screening of Breaking Dawn. #ObamaPhotoCaptions
Tyler Morrow
@HuffingtonPost #ObamaPhotoCaptions This speech is almost as interesting as Mitt Romney's personality. #nexttopicplease
Donna Wickerd
@HuffingtonPost Damn, Hillary promised that peppermint mocha would pick me up! #obamaphotocaptions
LEKZIKON KENNETH
We've been discussing this issue for 4yrs and still have another 4yrs to discuss it. End this session, I need a burger #ObamaPhotoCaptions
Topcleric
@HuffingtonPost NO NOT THIS AGAIN!! #ObamaPhotoCaptions
libbie bo bibbie
@HuffPostPol "47% of TV has gotten so boring" #ObamaPhotoCaptions
Alex Schaffer
Joe just had to finish the co-op campaign on legendary on Halo 4 last night. Why do i let him do this to me? #ObamaPhotoCaptions
Marissa Livengood
http://t.co/YWi7qFZA #ObamaPhotoCaptions
OMG someone is playing Rush Limbaugh archived tapes
Matthew Hawley
Excelleeent. Mr. Burns ain't got nothing on me! #ObamaPhotoCaptions
Qasim Rashid
"Re election? Check. Alright, time to mail it in these next four years." #ObamaPhotoCaptions http://t.co/NHRkzICu"
Gay Polk-Payton
@HuffPostPol A hungry POTUS sneaks a cookie into his mouth during summit. #ObamaPhotoCaptions
Also on HuffPost:
Posted: 11/20/2012 9:32 am EST Updated: 11/20/2012 9:48 am EST