When Jordan 'Rizzle' Stephens answers the phone he immediately apologises – for the fact he's eating a digestive biscuit while talking.
It's not exactly throwing a TV out the hotel room, and Jordan admits he's still coming to terms with the duo's rise to fame, which has included hit singles, a Top 5 album, a tour with Professor Green and celebrity fans in James Corden and Stephen Fry.
"I don't know how to take it in, " he chuckles, once he has finished munching.
"Naturally, it's in my personality to aim higher, and I'm a very competitive person, but when you're suddenly friends with Olly Murs and Ed Sheeran – although I've known Ed for a few years – it's crazy.
"It's only when my friends ask me about everything that it sinks in. It freaks me out."
Next for the Brighton twosome, who saw their Stereo Typical album earn great reviews for its cheery take on hip-hop, will be the O2 ABC tonight, a show upgraded from the Arches due to demand.
It's something the group can't wait for, as they're known for a boundlessly energetic show.
"On the Professor Green tour we played the Barrowland, and it was a great atmosphere there.We really loved it," recalls Jordan.
"When we first started doing shows, we overcompensated and ran around the stage a lot because no-one knew who we were, and we wanted people to remember us, even if it was just for doing cartwheels onstage. We've never left that state of mind."
Unlike many modern hip hop stars, Jordan and cohort Sylvester 'Harley' Alexander-Sule deliver tunes that are lighter in tone, with an emphasis on having fun and a good time rather than any gangster antics.
That upbeat style harkens all the way back to late 80s pioneers like De La Soul, even though Jordan still admires modern acts.
"I think modern hip hop's great, but it goes through phases," he says.
"At the moment, the hip hop you hear a lot of is really dark. "
Friends for years, and both students at the Brit School in Brighton, Jordan originally roped Harley in to help out on just one song.
"I was entering competitions, just for the hell of it, and one day I'd heard a Flobots song with singing in it, and I wanted that feel," he recalls.
"I knew Harley's style, so asked him if he wanted to go to the studio, and a friend heard what we'd done and said that's kinda cool, so we decided to just carry on doing it, and Rizzle Kicks was born."
They received a supportive tweet from none other than Stephen Fry last year, who said he loved their sound, while James Corden starred in their recent Mama Do The Hump video.
"James Corden's a legend," Jordan says, enthusiastically
"He said on the radio he liked Down With The Trumpets (their early single), so we tweeted him about being in a video and we thought we'd got him in the bag, but it never went from there.
"But coincidentally, we were gigging in Birmingham when he was doing a play there.
"He was outside a hotel having a cigarette, we stopped him, exchanged numbers and Bob's your uncle – he was appearing in the video!"
l Rizzle Kicks, O2ABC, tonight, £10, 7pm.