Wow, this takes me back. I have no idea what the bike was, only that it was black, BMX style, and had a funky black plastic casing along the top bar, and a big box on the handlebars that made noises when you hit the button by the grips. It may even have had a rear mud guard for a short time before it probably got broken off by young hi-jinx and possibly a big front mud guard too, motocross style. I don't think it's the bike I learnt on though.