Lawnmower Game?

As a child (in the early to mid nineties I guess), I used to play a game where you mowed a lawn while avoiding all sorts of weird obstacles as you went, including a moving frog-like thing and shark infested waters. It was more fun than it may sound. Does anyone remember this? I can't find any sign of it on the internet.

That game was called The Lawn Zapper.

Thank you so much! It was driving me crazy. While I'm here, to you remember an old (but more recent than Lawn Zapper) game that was a kind of helicopter simulator? You could blow up vehicles and other helicopters and when you were in danger of being shot down yourself, a man's voice would say "Missile Threat".

If you don't know it, that's cool. I'm already vastly impressed by your being able to identify Lawn Zapper