I will present recent work from the lab related to active behaviours. First, I will discuss new tools we developed (BonVision; Lopes et al, eLife, 2021) to study active behaviours. I will then discuss recent findings on the responses of visual cortex to sudden perturbations, which suggest that feature selectivity can explain mismatch responses reported in mouse primary visual cortex (Muzzu & Saleem, Cell Reports, 2021). I will discuss our recent discoveries on how the temporal dynamics of visual responses in mouse cortex, and how these are altered by behavioural state at a single cell and population level (Horrocks & Saleem, bioRxiv).