It's just a small sting to Eggsy, because he imagines it must sting a bit. He's really never been hit with one so he can only guess. This isn't the high impact of some other things. It's not multi-tailed like the flogger Dorian used in the club. It's not something like a cane, which Eggsy hasn't experienced either but imagines would be...tougher.

He frowns just a bit. "Stings, I guess?" he answers.