Youtube banner ads with sound?!

do i have a malware or something, this particular embedded ad for some baseball game or whatever comes with sound, while i watch a video on youtube. i would like to not use an adblocker, but if this is not an anomaly… is there a quick way to check without downloading the plethora of scanners in that GQ faq sticky? it hasn’t come up anywhere else so far except on youtube. i’ve tried disabling stuff but it seems to come along with the Flash player.