A polar bear was driving along the road when his car broke down. He called the recovery service who arrived within a short time. The mechanic said he would need about an hour to fix it. The polar bear walked to the nearest supermarket, where he bought himself an ice-cream. He ate it as he walked back to the car, but smeared some of it around his mouth.
As he got back to the car, the mechanic looks up at the polar bear and says 'it looks like you've blown a seal'. The polar bear looks embarrassed, wipes his mouth, and says 'No I haven't, it's just ice-cream’!