you know your a trials rider when.... 
 
you walk round town and you hear a big lorrys brakes (or horn for that matter (or you live somewhere near a port and a ship blows its horn)) and you snap you head around thinking - OTHER TRIALS RIDERS !! 
 
or . . .  
 
when you walk round a different town to your home and you see guard marks and you think - yeah that would be cool to have a go at or i could clean that . . . . etc