What ridiculously common thing can't you do.

[noworry]

I can't multitask at all, I have to focus at one thing at a time.

I also can't pronounce certain words in my native language right (there's a diffrence between kj- and sj-, and I mix them up a lot) It annoys some of my friends but eh

 

[Vulpix037]

1. Whistle
2. Click my fingers
3. Not much else, to be honest.

 

[Gengarzilla]

I can't click my fingers at all. Whistling, though? Not a problem.

 

[Aozora]

I can't multitask to save my life either. Like if someone starts talking to me and I'm doing something, I just immediately drop what I'm doing. Even if it's something really simple.

 

[dragon_nataku]

Oh man, that reminds me, I cannot, repeat, CANNOT drive and talk at the same time. Either talk to yourself and let me drive or expect to have an accident because I can't concentrate, man.

 

[Stratelier]

Me ... I don't drive.

 

[IncineROAR]

I can't click my fingers at all. Whistling, though? Not a problem.

I can't do either of the above. I also have absolutely no idea how to use a lighter.

 

[Anime Psyclone]

I can’t sleep.
Even with medicine I sleep better at day then at night

 

[Esserise]

I physically can whistle, but I am completely rubbish at it and should probably spare the people around me the agony.

I can't go underwater while swimming. Combine my fear of drowning with my never having learned how to hold my breath underwater and there you go~

I also seem to be incapable of accepting a personal compliment without some degree of deflection/downplaying, or at the very least an uncomfortable feeling that I keep to myself.

ETA: I also don't think I can make a post without later going back to edit it in some way.

 

[impervious_gakko42]

I can't roll my r's for shit so I just substitute it with this motorcycle noise I make in the back of my throat

 

[Luci_]

I can’t swim nor ride a bike and d take well to compliment s

 

[Zexy]

Can't use roller skates (never had any) or blow bubblegun bubbles (I never liked gum in the first place).

And the most hilarious, all my friends from university like to tease me for it; I cannot make a paper boat. (note: I'm studying shipbuilding)

All these still apply... I also cannot ride a bike without trainer wheels, drive any vehicle, whistle...