S.39 Assault covers grazes, scratches, abrasions, minor bruising, swellings, reddening of the skin, superficial cuts, black eyes so i'd suggest it was a probably slightly more than 'touching without consent' and slightly less than defenestration.
i've heard miles worse at matches than has been expressed by anyone here (not that i was at yesterday's game). as ever the phrase "f*** OFF KEWELL YOU SCHITHOUSE CN*T" readily springs to mind.
did they follow it up with "Innocent Man" by Billy Joel - if so you may be onto something. Otherwise..... i dunno...... just seems unlikely but maybe that's just me......