Lee said earlier in the thread he changed to TT bike in the pen before the start - it's a known bug that if you do that, although you can see the bike you changed to, it looks different to the riders around you. Exactly the same happened with Michael in Tuesday's race but in his case he changed from TT bike to road bike and it looked to everyone else like he was still on a TT bike.
I've wondered in the past about exploiting this in the ZRL and making everyone else think you're on a mountain bike or something to mess with their minds