A smiling Joe Biden rained down zingers and insults on Paul Ryan at the VP debate on Oct. 11. 

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resident Obama declined to zing Mitt Romney at their first debate, and Joe Biden appears to be compensating by using all the arrows in the Democratic quiver against Paul Ryan in tonight's debate. From the economy to foreign policy, Biden continuously challenged Ryan, and even called him out on his "malarkey." Right off the bat, Ryan criticized the Obama administration's muddled handling of a terror attack in Libya. Biden's response: ""With all due respect that's a bunch of malarkey. Not a single thing he said was true." It didn't get any better for Ryan from there. Here, some of Biden's most effective hits:

Not mathematically possible," Biden's quote.Picking up on Clinton's arithmetic line. #Debate2012

— Lola Ogunnaike (@lolaogunnaike) October 12, 2012

"I wish he would just tell.... be a little more candid." -Biden huff.to/TkeTq8#debates #hp2012

— Huffington Post (@HuffingtonPost) October 12, 2012

Biden: "This is a bunch of stuff..." Translation: "This is a whole lot of bullshxt!"

— 제이드(@AloelLee) October 12, 2012

Biden to Ryan: "Oh, now you're Jack Kennedy?"

— The New York Times (@nytimes) October 12, 2012

"Their ideas are old, their ideas are bad." That's a pretty good line.

— Jonathan Bernstein (@jbplainblog) October 12, 2012

"Stop talking about how you care about people. Show me something." -Biden #debates #hp2012

— Huffington Post (@HuffingtonPost) October 12, 2012

#Biden: This recession didn't fall from the sky, #Ryan created it by voting to put two wars on a credit card. #debates

— Rachel Van Dongen (@RachelVanD) October 12, 2012

Of course, plenty of viewers complained that Biden interrupted too often and may have turned off viewers by smirking at Ryan's responses.

Seems like debate prep for Biden involved them telling him to just interrupt Ryan as much as possible, like a guy in a bar. #msnbc2012

— msnbc (@msnbc) October 12, 2012

The Romney campaign already has video of Biden "cackling." #VPDebate read.bi/SUQ89Q

— Business Insider (@businessinsider) October 12, 2012

Ryan to Biden: "You're under duress to make up for lost ground" tpm.ly/RARu4E

— Talking Points Memo (@TPM) October 12, 2012