Ya if he's shoving a wide range and you are closing the action this is a snap call.

On friday i was playing a 50NL table with a similar maniac at the table, who was randomly spazz shoving preflop with hands like Q5o and 73s. Anyway him and another guy at the table eventually got 300bbs deep and he spazz shoved the button for like the 5443544543th time in a row and the dude in the BB tanked for ages and folded AKs (or so he claimed). When I asked why on earth he folded he said 'well he could have 22'. LOOOOOL.