And now he's dead. CW for gore and, uh, I tagged it as 'passive suicidality' but it's because he's falling into a bottomless pit from whence there is no escape, rather than because this is something he struggles with in general.
Out of curiosity I found a terminal velocity calculator and punched in some highly approximate numbers and to fall for 36 minutes he'd have travelled about 85-90 miles into the Tommy Bahama.
If not he'd have to estimate how long it took him to get bored based on the typical length of his attention span, since whatever he normally uses to tell time would have stayed on the regular Serena Eterna.