Sheldon's reaction to seeing Amy in the dress (both times).
The bowtie.
Not just allowing it to be a bit askew, but understanding why.
Telling his mom that it's good the way it is.
Using it as a lead-in to delaying the ceremony.
Amy's mom and dad.
Penny and Amy's mom.
Best of all, Sheldon with his mom.

Teller having a line.

I had to stop and think about what had just happened.

That was the first time I had ever seen Teller speak. I bet they paid big bucks for those two words....

Ray
HD

Here are some videos with Teller speaking, and here is the part we're talking about.

I missed it while I was on my trip to NC. I have to catch up!!

I'd have to add Sheldon with his brother the episode before.

TG