Hold on to your seats this lunchtime as Hungarian organist, pianist and improviser László Fassang raises the roof at Symphony Hall with the full power of the Symphony Hall organ. This fittingly all-Hungarian programme opens with Liszt’s incredibly virtuosic Mephisto Waltz No 1, before paying homage to Hungarian organist Dezso d’Antalffy, and folk song inspired music from the most famous Hungarian composer of all – Bartok.