You get caught pretending like you remember someone's name.
When you wave back at someone who it turns out was not waving at you.
When you're a kid in class and your teacher bends over to talk to
another student and sticks her butt in your face without realizing it.
Walking around with a cast that only has one signature on it.
Singing the beginning of the first verse when the second verse is starting.
The people who are in on the inside joke explain it to you after you've already laughed at it.
Turns out Kyle's the other Asian guy you've worked with for three years.
For more moments of awkwardness, check out The 5 Most Socially Awkward Situations Everyone Deals With and 5 Terrible Situations for the Socially Awkward Man.