WATCH: Hillary busts out laughing as Tim Kaine calls out somebody's lack of transparency

In his first speech as Hillary Clinton’s running mate, Sen. Tim Kaine called out somebody for a lack of transparency. That “somebody” was Donald Trump:

Kaine: "Where are Donald Trump's tax returns?"

— Mark Murray (@mmurraypolitics) July 23, 2016

Tim Kaine asks, "Where are Donald Trump's tax returns?" https://t.co/VnaB0BZWqm pic.twitter.com/0BTTI0Ig3O

— CBS News (@CBSNews) July 23, 2016

Hillary laughed like many did, though not for the same reasons:

https://twitter.com/Michael_Priebe_/status/756914140371968004

What about @HillaryClinton speeches to Wall ST? #NeverEverHillary #DNCLeak

— ⏳Karina #FreeAssange⏳ (@jetgirl212212) July 23, 2016

Where are Hillary speeches she gave to wall st? https://t.co/KhURX4liYR

— Matthew Battle (@librab103) July 23, 2016

https://twitter.com/TheLastBrian/status/756911731159470081

Where are Hillary's speeches ? She admits she wants to keep us ignorant. #DNCLeaks

— Progressive GOP (@NixonandIke) July 23, 2016

and we ask where is the Foundation money coming from??!!!

— juan renteria (@superenteria) July 23, 2016