Super Junior's Choi Siwon surprised fans by showing off his tight abs on the August 23rd episode of SBS's 'Strong Heart'. As actor Sung Hoon Ee prepared to display his abs, MC Kang Ho Dong looked towards Siwon and stated, "And Siwon-sshi, you get ready, too," which caught Siwon by surprise. Siwon replied, "I knew that Ho Dong-hyung (older brother) would request something like this. However, I thought... maybe, just maybe, he wouldn't, so I didn't really prepare my abs." However, there wasn't much to worry about as his abs were impressive enough to surprise not only female guests, but the male guests as well. Afterwards, the guests commented, "Is that what you look like when you don't prepare? That's awesome." Source: Xports News via Nate