I'll play Devil's advocate (and Pato will crucify me for this) and say it:
I found that penalty execution to be disrespectful of Celta. I know it's a resource and it's valid, but clearly Messi and Suárez were not thinking about the rival. They were thinking about how many goals each one has and whose goal that one will be.
For the record, I'm neither a Barca or Madrid fan, so I'm being unbiased here.