A12 Northbound from M25 Thurs 29 Sept 6.30ish

[S1_RS]

Last night I was coming home and had not long joined the A12 north from the M25 when I saw some bright lights in the rvm. I saw a chap on a Motorcyle pass through between the cars behind in the inner & outer lanes. Nothing weird about this but he was closely followed by a black Mk2 Focus who forced his way through. The bike remained behind me but the Focus then comes up behind me and the car to my left but this time he went to the far left and shot up the hard shoulder at about 90-100. He then carried on straight through a layby at the same speed. As he went past I saw a load of sparks flying up from the passenger side door area but couldnt make out what was causing it. TBH It was quite a scary experience. I can only assume it was the getaway from a robbery or a stolen car. Anyone else see it last night?